SwipeHelper: Ignore ACTION_OUTSIDE touches

  When using the swiper class within a layout like a notification container
  elsewhere the notification shade, when tapping outside even if the finger will
  not move is easy to detect an ACTION_MOVE event. That will consider it like a
  dragging event and the view swipes to left a bit on its own getting stuck
  until next touch. Break if tapping outside, so it doesn't go mistakely forward
  to ACTION_MOVE event case.

Change-Id: I07e5a3a95b8bbebeadcc97ba2d7d1cf787a37e61
Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>