Merge "ViewRootImpl: Update opaque flag if SurfaceControl changes from relayout" into sc-dev am: ad85547f am: 1fac7bc6 am: 88977af8 am: 3bc0fd35

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

Change-Id: I596825a4df4e9f9b82eef2bf3dbece941cf448d7