Ensure that SwipeDismissBehavior only swipes it's own View

Currently it could intercept the touch for any view within
the CoordinatorLayout. This CL fixes it by checking
that the MotionEvent is within the Behaviors attached
View.

BUG: 21838809
Change-Id: I9f22443ea65a9e7d4b6d63e58a513bd57824204b
1 file changed