Merge "Add null check before trying to give appOps to package." into sc-dev

    private static void assignExclusiveSmsPermissionsToSystemApp(Context context,

            PackageManager packageManager, AppOpsManager appOps, String packageName,

            boolean sigatureMatch) {

        if (packageName == null) return;

        // First check package signature matches the caller's package signature.

        // Since this class is only used internally by the system, this check makes sure

        // the package signature matches system signature.