Add check to allow notification listener packages to post >50 notifications

        }

        checkCallerIsSystemOrSameApp(pkg);

        final boolean isSystemNotification = isUidSystem(callingUid) || ("android".equals(pkg));

        final boolean isNotificationFromListener = mEnabledListenerPackageNames.contains(pkg);

        final int userId = ActivityManager.handleIncomingUser(callingPid,

                callingUid, incomingUserId, true, false, "enqueueNotification", pkg);

        final UserHandle user = new UserHandle(userId);

        // Limit the number of notifications that any given package except the android

        // package can enqueue.  Prevents DOS attacks and deals with leaks.

        if (!isSystemNotification) {

        // package or a registered listener can enqueue.  Prevents DOS attacks and deals with leaks.

        if (!isSystemNotification && !isNotificationFromListener) {

            synchronized (mNotificationList) {

                int count = 0;

                final int N = mNotificationList.size();