Merge "ViewRootImpl: Update opaque flag if SurfaceControl changes from relayout" into sc-dev am: ad85547f8b

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

Change-Id: I68abde8c0b422a07b6f8b8ea20f7db1e88b95258