Merge "Isolate count of visible window from mirror of uid state" into...

Merge "Isolate count of visible window from mirror of uid state" into sc-v2-dev am: e55e1952 am: 4641fb4e am: 41069333 am: e80e5869

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17135563

Change-Id: I11c2d5bfc33810a79bb443d8ddf17cabd3771a7d