Revert "Add UI for mandatory backups' policy."

It was decided to hide the mandatory backup's API in a recent review.

Bug: 77801801
Bug: 73750212

This reverts commit 8f29eb499682b7054a6e826d6e2ca388759608d3.

Change-Id: I0e3a0a499895f55c7afb7b0a0f8f9a72d0227bbd

Author: Lenka Trochtova

app/src/main/java/com/afwsamples/testdpc/policy/PolicyManagementFragment.java

@@ -52,7 +52,6 @@
 import android.security.KeyChain;
 import android.security.KeyChainAliasCallback;
 import android.service.notification.NotificationListenerService;
-import android.support.annotation.Nullable;
 import android.support.annotation.RequiresApi;
 import android.support.annotation.StringRes;
 import android.support.v14.preference.SwitchPreference;
@@ -283,13 +282,6 @@ public class PolicyManagementFragment extends BaseSearchablePolicyPreferenceFrag
     private static final String MANAGE_APP_RESTRICTIONS_KEY = "manage_app_restrictions";
     private static final String MANAGED_PROFILE_SPECIFIC_POLICIES_KEY = "managed_profile_policies";
     private static final String MANAGE_LOCK_TASK_LIST_KEY = "manage_lock_task";
-    private static final String MANDATORY_BACKUPS = "mandatory_backups";
-    private static final String MANDATORY_BACKUP_ACCOUNT_CHANGED_ACTION =
-            "com.google.android.gms.backup.MANDATORY_BACKUP_ACCOUNT_CHANGED";
-    private static final String MANDATORY_BACKUP_ACCOUNT_NAME_APP_RESTRICTION =
-            "mandatoryBackupAccountName";
-    private static final String MANDATORY_BACKUP_ACCOUNT_TYPE_APP_RESTRICTION =
-            "mandatoryBackupAccountType";
     private static final String MUTE_AUDIO_KEY = "mute_audio";
     private static final String NETWORK_STATS_KEY = "network_stats";
     private static final String PASSWORD_CONSTRAINTS_KEY = "password_constraints";
@@ -375,9 +367,6 @@ public class PolicyManagementFragment extends BaseSearchablePolicyPreferenceFrag
             BatteryManager.BATTERY_PLUGGED_USB |
             BatteryManager.BATTERY_PLUGGED_WIRELESS);
     private static final String DONT_STAY_ON = "0";
-    public static final String GMSCORE_PACKAGE = "com.google.android.gms";
-    public static final String GMSCORE_BACKUP_TRANSPORT =
-            "com.google.android.gms.backup.BackupTransportService";
 
     private static final int USER_OPERATION_ERROR_UNKNOWN = 1;
     private static final int USER_OPERATION_SUCCESS = 0;
@@ -405,7 +394,6 @@ public class PolicyManagementFragment extends BaseSearchablePolicyPreferenceFrag
     private DpcSwitchPreference mInstallNonMarketAppsPreference;
 
     private SwitchPreference mEnableBackupServicePreference;
-    private SwitchPreference mMandatoryBackupsPreference;
     private SwitchPreference mEnableSecurityLoggingPreference;
     private SwitchPreference mEnableNetworkLoggingPreference;
     private SwitchPreference mSetAutoTimeRequiredPreference;
@@ -523,8 +511,6 @@ public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         findPreference(REMOVE_DEVICE_OWNER_KEY).setOnPreferenceClickListener(this);
         mEnableBackupServicePreference = (SwitchPreference) findPreference(ENABLE_BACKUP_SERVICE);
         mEnableBackupServicePreference.setOnPreferenceChangeListener(this);
-        mMandatoryBackupsPreference = (SwitchPreference) findPreference(MANDATORY_BACKUPS);
-        mMandatoryBackupsPreference.setOnPreferenceChangeListener(this);
         findPreference(REQUEST_BUGREPORT_KEY).setOnPreferenceClickListener(this);
         mEnableSecurityLoggingPreference =
             (SwitchPreference) findPreference(ENABLE_SECURITY_LOGGING);
@@ -637,7 +623,6 @@ public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         reloadScreenCaptureDisableUi();
         reloadMuteAudioUi();
         reloadEnableBackupServiceUi();
-        reloadMandatoryBackupsUi();
         reloadEnableSecurityLoggingUi();
         reloadEnableNetworkLoggingUi();
         reloadSetAutoTimeRequiredUi();
@@ -1137,16 +1122,7 @@ public boolean onPreferenceChange(Preference preference, Object newValue) {
             case ENABLE_BACKUP_SERVICE:
                 setBackupServiceEnabled((Boolean) newValue);
                 reloadEnableBackupServiceUi();
-                reloadMandatoryBackupsUi();
                 return true;
-            case MANDATORY_BACKUPS:
-                if ((Boolean) newValue) {
-                    showMandatoryBackupAccountPicker();
-                    return false;
-                } else {
-                    setupMandatoryBackups(null);
-                    return true;
-                }
             case ENABLE_SECURITY_LOGGING:
                 setSecurityLoggingEnabled((Boolean) newValue);
                 reloadEnableSecurityLoggingUi();
@@ -2090,14 +2066,6 @@ private void reloadEnableBackupServiceUi() {
         }
     }
 
-    @TargetApi(28)
-    private void reloadMandatoryBackupsUi() {
-        if (mMandatoryBackupsPreference.isEnabled()) {
-            mMandatoryBackupsPreference.setChecked(
-                    null != mDevicePolicyManager.getMandatoryBackupTransport());
-        }
-    }
-
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     private void reloadScreenCaptureDisableUi() {
         boolean isScreenCaptureDisabled = mDevicePolicyManager.getScreenCaptureDisabled(
@@ -3382,65 +3350,6 @@ private int validateAffiliatedUserAfterP() {
         }
     }
 
-    @TargetApi(28)
-    private void showMandatoryBackupAccountPicker() {
-        if (!BuildCompat.isAtLeastP()) {
-            return;
-        }
-        if (getActivity() == null || getActivity().isFinishing()) {
-            return;
-        }
-        List<Account> accounts = Arrays.asList(mAccountManager.getAccounts());
-        if (accounts.isEmpty()) {
-            showToast(R.string.no_accounts_available);
-        } else {
-            AccountArrayAdapter accountArrayAdapter =
-                new AccountArrayAdapter(getActivity(), R.id.account_name, accounts);
-            new AlertDialog.Builder(getActivity())
-                .setTitle(R.string.mandatory_backup_account)
-                .setAdapter(
-                    accountArrayAdapter,
-                    (dialog, position) -> setupMandatoryBackups(accounts.get(position)))
-                .show();
-        }
-    }
-
-    @TargetApi(28)
-    private void setupMandatoryBackups(@Nullable Account account) {
-        boolean makeBackupsMandatory = account != null;
-        // For the data to be backed up to Google Drive, set the backup transport to the GmsCore's
-        // backup transport.
-        mDevicePolicyManager.setMandatoryBackupTransport(mAdminComponentName, makeBackupsMandatory ?
-                new ComponentName(GMSCORE_PACKAGE, GMSCORE_BACKUP_TRANSPORT) : null);
-
-        // Set app restrictions with the account type and name on GmsCore to let it know which
-        // account it should use for backing up the data and notify GmsCore about the change by
-        // sending a broadcast to it.
-        String name = account != null ? account.name : null;
-        String type = account != null ? account.type: null;
-        Bundle appRestrictions = mDevicePolicyManager.getApplicationRestrictions(
-                mAdminComponentName, GMSCORE_PACKAGE);
-        if (name == null) {
-           appRestrictions.remove(MANDATORY_BACKUP_ACCOUNT_NAME_APP_RESTRICTION);
-        } else {
-           appRestrictions.putString(MANDATORY_BACKUP_ACCOUNT_NAME_APP_RESTRICTION, name);
-        }
-        if (type == null) {
-            appRestrictions.remove(MANDATORY_BACKUP_ACCOUNT_TYPE_APP_RESTRICTION);
-        } else {
-            appRestrictions.putString(MANDATORY_BACKUP_ACCOUNT_TYPE_APP_RESTRICTION, type);
-        }
-        mDevicePolicyManager.setApplicationRestrictions(
-                mAdminComponentName, GMSCORE_PACKAGE, appRestrictions);
-        Intent intent = new Intent(MANDATORY_BACKUP_ACCOUNT_CHANGED_ACTION);
-        intent.setPackage(GMSCORE_PACKAGE);
-        getContext().sendBroadcast(intent);
-
-        // Update the UI for backup-related policies.
-        reloadEnableBackupServiceUi();
-        reloadMandatoryBackupsUi();
-    }
-
     abstract class ManageLockTaskListCallback {
         public abstract void onPositiveButtonClicked(String[] lockTaskArray);
     }

app/src/main/res/values/strings.xml

@@ -546,8 +546,6 @@
 
     <!-- Backup and Restore for Device Owner -->
     <string name="enable_backup_service">Enable backup service</string>
-    <string name="mandatory_backups">Make backups mandatory</string>
-    <string name="mandatory_backup_account">Select mandatory backup account</string>
 
     <!-- Enterprise security logging -->
     <string name="enable_security_logging">Enable security logging</string>

app/src/main/res/xml/device_policy_header.xml

@@ -599,11 +599,6 @@
             android:title="@string/enable_backup_service"
             testdpc:admin="deviceOwner"
             testdpc:minSdkVersion="O" />
-        <com.afwsamples.testdpc.common.preference.DpcSwitchPreference
-            android:key="mandatory_backups"
-            android:title="@string/mandatory_backups"
-            testdpc:admin="deviceOwner"
-            testdpc:minSdkVersion="P" />
         <com.afwsamples.testdpc.common.preference.DpcPreference
             android:key="wipe_data"
             android:title="@string/wipe_data"