[RESTRICT AUTOMERGE] Restrict ApnEditor settings

- Finish ApnEditor settings if user is not an admin

- Finish ApnEditor settings if user has DISALLOW_CONFIG_MOBILE_NETWORKS restriction

Bug: 279902472
Test: manual test
make RunSettingsRoboTests ROBOTEST_FILTER=ApnEditorTest

Change-Id: Iecdbbff7e21dfb11e3ba385858747a220cfd3e04

src/com/android/settings/network/ApnEditor.java

@@ -25,6 +25,7 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.PersistableBundle;
+import android.os.UserManager;
 import android.provider.Telephony;
 import android.telephony.CarrierConfigManager;
 import android.telephony.SubscriptionInfo;
@@ -264,6 +265,11 @@ public class ApnEditor extends SettingsPreferenceFragment
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
+        if (isUserRestricted()) {
+            Log.e(TAG, "This setting isn't available due to user restriction.");
+            finish();
+            return;
+        }
 
         setLifecycleForAllControllers();
 
@@ -1338,6 +1344,23 @@ public class ApnEditor extends SettingsPreferenceFragment
         }
     }
 
+    @VisibleForTesting
+    boolean isUserRestricted() {
+        UserManager userManager = getContext().getSystemService(UserManager.class);
+        if (userManager == null) {
+            return false;
+        }
+        if (!userManager.isAdminUser()) {
+            Log.e(TAG, "User is not an admin");
+            return true;
+        }
+        if (userManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS)) {
+            Log.e(TAG, "User is not allowed to configure mobile network");
+            return true;
+        }
+        return false;
+    }
+
     public static class ErrorDialog extends InstrumentedDialogFragment {
 
         public static void showError(ApnEditor editor) {