Pass Immutable flag to vr intent

ManagedApplicationService originally used MUTABLE_UNAUDITED for pending intent, change to IMMUTABLE.

Bug: 154917065

Test: build & flash

Change-Id: Idb652edba7dbfe1df11134494d58348fedab64aa

services/core/java/com/android/server/utils/ManagedApplicationService.java

@@ -304,7 +304,8 @@ public class ManagedApplicationService {
             }
             if (mSettingsAction != null) {
                 intent.putExtra(Intent.EXTRA_CLIENT_INTENT,
-                        PendingIntent.getActivity(mContext, 0, new Intent(mSettingsAction), PendingIntent.FLAG_MUTABLE_UNAUDITED));
+                        PendingIntent.getActivity(mContext, 0, new Intent(mSettingsAction),
+                                PendingIntent.FLAG_IMMUTABLE));
             }
 
             mConnection = new ServiceConnection() {