Add NO_FOCUS_CHANGE flag to MotionEvent

The FLAG_NO_FOCUS_CHANGE will be  used with pointer gestures to allow the
user to direct gestures to an unfocused window without bringing the
window into focus.

Bug: 173733166
Test: None
Change-Id: I1ae7614634f1bdc73bc3093499441331bebb6d3d
1 file changed