Avoids vibration over deadzone in navigationbar

Removed the deadzone as a view and converted to a class that is attached
to NavigationBarView to determine if the incoming touch events should be
consumed by the deadzone.

Change-Id: I5bf6a9e48ba9fa2305ec98acfc537d14cb8cf725
Fixes: 77235132
Test: tap just above the home button in portrait
9 files changed