Merge "Ignore null action in AppRestrictionController." into main

        @Override

        public void onReceive(Context context, Intent intent) {

            final String action = intent.getAction();

            switch (intent.getAction()) {

            if (action == null) {

                return;

            }

            switch (action) {

                case Intent.ACTION_PACKAGE_ADDED: {

                    if (!intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {

                        final int uid = intent.getIntExtra(Intent.EXTRA_UID, -1);