Remove reflection for notification api.

Remove reflection used before O sdk was
final.

Test: compile, test app on O phone.
Change-Id: Id9078ee98bf566a9b3d8a47962ab5be3efdfb94a

Author: Kenny Guy

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

@@ -83,7 +83,6 @@
 import com.afwsamples.testdpc.common.MediaDisplayFragment;
 import com.afwsamples.testdpc.common.Util;
 import com.afwsamples.testdpc.common.CertificateUtil;
-import com.afwsamples.testdpc.common.ReflectionUtil;
 import com.afwsamples.testdpc.common.preference.DpcPreference;
 import com.afwsamples.testdpc.common.preference.DpcPreferenceBase;
 import com.afwsamples.testdpc.common.preference.DpcPreferenceHelper;
@@ -2312,14 +2311,16 @@ protected void setPermittedComponentsList(List<String> permittedInputMethods) {
         }
     }
 
+    @TargetApi(Build.VERSION_CODES.O)
     private void setNotificationWhitelistEditBox() {
         if (getActivity() == null || getActivity().isFinishing()) {
             return;
         }
         View view = getActivity().getLayoutInflater().inflate(R.layout.simple_edittext, null);
         final EditText input = (EditText) view.findViewById(R.id.input);
         input.setHint(getString(R.string.set_notification_listener_text_hint));
-        List<String> enabledComponents = getPermittedNotificationListeners();
+        List<String> enabledComponents = mDevicePolicyManager.
+                getPermittedCrossProfileNotificationListeners(mAdminComponentName);
         if (enabledComponents == null) {
             input.setText("null");
         } else {
@@ -2368,8 +2369,10 @@ protected List<ResolveInfo> getResolveInfoListFromAvailableComponents(
         }
 
         @Override
+        @TargetApi(Build.VERSION_CODES.O)
         protected List<String> getPermittedComponentsList() {
-            return getPermittedNotificationListeners();
+            return mDevicePolicyManager.
+                    getPermittedCrossProfileNotificationListeners(mAdminComponentName);
         }
 
         @Override
@@ -2378,35 +2381,17 @@ protected void setPermittedComponentsList(List<String> permittedNotificationList
         }
     }
 
+    @TargetApi(Build.VERSION_CODES.O)
     private void setPermittedNotificationListeners(List<String> permittedNotificationListeners) {
-        // STOPSHIP: Call actual method once in the SDK
-        boolean result;
-        try {
-            result = (boolean) ReflectionUtil.invoke(mDevicePolicyManager,
-                    "setPermittedCrossProfileNotificationListeners",
-                    new Class<?>[] {ComponentName.class, List.class},
-                    mAdminComponentName, permittedNotificationListeners);
-        } catch (ReflectionUtil.ReflectionIsTemporaryException e) {
-            Log.e(TAG, "Setting permitted notification listeners failed", e);
-            result = false;
-        }
+        boolean result = mDevicePolicyManager.
+                setPermittedCrossProfileNotificationListeners(
+                mAdminComponentName, permittedNotificationListeners);
         int successMsgId = (permittedNotificationListeners == null)
                 ? R.string.all_notification_listeners_enabled
                 : R.string.set_notification_listeners_successful;
         showToast(result ? successMsgId : R.string.set_notification_listeners_fail);
     }
 
-    private List<String> getPermittedNotificationListeners() {
-        // STOPSHIP: Call actual method once in the SDK
-        try {
-            return (List<String>) ReflectionUtil.invoke(mDevicePolicyManager,
-                    "getPermittedCrossProfileNotificationListeners", mAdminComponentName);
-        } catch (ReflectionUtil.ReflectionIsTemporaryException e) {
-            Log.e(TAG, "Setting permitted notification listeners failed", e);
-        }
-        return null;
-    }
-
     /**
      * Gets all CA certificates and displays them in a prompt.
      */