Merge "ViewRootImpl: Update opaque flag if SurfaceControl changes from relayout" into sc-dev am: ad85547f am: ddb1e2f9 am: 459f6551 am: 9697d3ca

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

Change-Id: I0bdce8ecb9aa1b764c55134898a84898a395cfe5