Merge "Avoid sending messages of destroyed Engine" into udc-dev am: 359c0a20...

Merge "Avoid sending messages of destroyed Engine" into udc-dev am: 359c0a20 am: 3b1013b1 am: e7f413fb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24103711



Change-Id: Ib725f0658e6d555a3791d736fce03d44de409704
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>