Merge "Unblocking surface sync if the viewroot dies before traversal can...

Merge "Unblocking surface sync if the viewroot dies before traversal can happen" into tm-qpr-dev am: c9425a38

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20965583



Change-Id: I6316086651d035ace0f0af54073c3c9eb7efdb5e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>