Merge "ViewRootImpl: Update opaque flag if SurfaceControl changes from relayout" into sc-qpr1-dev am: 8dc8182a am: bd61cfb0 am: 1be5898c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15934803

Change-Id: Ic354726d15fd41818a286ff6fb0235d61884f152