Actually fix notification listeners dismissing bubbles

Similar to foreground service notifications, bubbles should also not be
dismissable via a cancel on a notification listener.

This CL makes it such that any notif with FLAG_BUBBLE will not be dismissed
via a cancel from a notification listener.

Test: atest NotificationManagerServiceTest
Bug: 128459529
Change-Id: I4602931209dc6d65b0d79ba5aba684cba705d25e