Merge "ViewRootImpl: Update opaque flag if SurfaceControl changes from relayout" into sc-dev am: ad85547f am: ddb1e2f9 am: a59f1a8a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15937114

Change-Id: I9d3c724ece645b024b9eb807a592012ac79ebdcc