Merge "Add mechanism for a task's windows to be trusted overlays" into sc-dev am: 24706f06 am: 95b87d42 am: edbfee6f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15150506

Change-Id: I49bade10da4b3119e9f9db27e614aef3c259cf47