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

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

Change-Id: Ib40d2ad92e47cfcb6a89b6dacadd540c3f51d15a