[automerger skipped] Add mechanism for a task's windows to be trusted overlays...

[automerger skipped] Add mechanism for a task's windows to be trusted overlays am: 47fb132e am: 12c79562 -s ours am: 901c2512 -s ours

am skip reason: Merged-In I170cb5a7d22ef569eb36de21cc0bcbef60dd385e with SHA-1 954ce27d is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15975849

Change-Id: Id7e9ed6dd24adedde91a8e002a3326e673901eb0