Merge "Avoid sending messages of destroyed Engine" into udc-dev am: 359c0a200f am: 3b1013b1ab

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

Change-Id: Ie7dc8202a6ef3583bc744decdad35c49d41908d1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>