Create button which ignores clicks when window is partially obscured

Currently there is a protection to prevent clicks which go through an
overlay, but the overlay might be covering sensitive information rather
than the button. We now prevent clicks if there is any overlay over any part
of the window.

[DO NOT MERGE] PermissionController moved to different project

Test: Manual
Test: atest PermissionTapjackingTest
Bug: 175190844
Bug: 196389741

Merged-In: Ie0238aede5fb1d781e71c3c6f30b63dd02a1eb2c
Change-Id: Ie0238aede5fb1d781e71c3c6f30b63dd02a1eb2c
(cherry picked from commit 7bba0cc89e96d9c52a5fb3e53bd4fbdd83119a4f)
Merged-In: Ie0238aede5fb1d781e71c3c6f30b63dd02a1eb2c