Support Private DNS User restriction

Allow application of the DISALLOW_CONFIG_PRIVATE_DNS user restriction.

Bug: 112982691
Test: Manual, set the user restriction and verified the settings cannot be changed.
Change-Id: Id2738ff16f1fa485655705bb84a61222a2054b99

Author: eranmes

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

@@ -55,6 +55,8 @@ public class UserRestriction {
     public static final String DISALLOW_PRINTING= "no_printing";
     public static final String DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY =
             "no_install_unknown_sources_globally";
+    public static final String DISALLOW_CONFIG_PRIVATE_DNS =
+            "disallow_config_private_dns";
 
     public String key;
     public int titleResId;
@@ -206,6 +208,9 @@ public UserRestriction(String key, int titleResId) {
             new UserRestriction(
                     DISALLOW_PRINTING,
                     R.string.disallow_printing),
+            new UserRestriction(
+                    DISALLOW_CONFIG_PRIVATE_DNS,
+                    R.string.disallow_config_private_dns),
     };
 
     /**
@@ -234,7 +239,8 @@ public UserRestriction(String key, int titleResId) {
             DISALLOW_SMS,
             DISALLOW_UNMUTE_MICROPHONE,
             DISALLOW_USB_FILE_TRANSFER,
-            DISALLOW_AIRPLANE_MODE
+            DISALLOW_AIRPLANE_MODE,
+            DISALLOW_CONFIG_PRIVATE_DNS,
     };
 
     /**
@@ -305,5 +311,6 @@ public UserRestriction(String key, int titleResId) {
 
     public static String[] QT_PLUS_RESTRICTIONS = {
             DISALLOW_INSTALL_UNKNOWN_SOURCES_GLOBALLY,
+            DISALLOW_CONFIG_PRIVATE_DNS,
     };
 }

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

@@ -466,6 +466,7 @@
     <string name="disallow_ambient_display">Disallow ambient display</string>
     <string name="disallow_share_into_work_profile">Disallow sharing data into the profile</string>
     <string name="disallow_printing">Disallow printing</string>
+    <string name="disallow_config_private_dns">Disallow config Private DNS</string>
     <string name="user_restriction_error_msg">Operation not allowed</string>
 
     <!-- Strings for select app -->