Merge "Merge "WM: Mark screen rotation layer as opaque" into sc-dev am: 0afea057 am: 25723dbf" into sc-v2-dev-plus-aosp am: c9677215

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15145170

Change-Id: Ie8cd2ae2d342c8761afde5af517e3b40cc37fde9