Merge "Avoid sending messages of destroyed Engine" into udc-qpr-dev am: 43c450a126 am: 931a1760f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24082715

Change-Id: I8ea9cb576a5a506fd0d83f9446f149744640fe0f
Signed-off-by: Automerger Merge Worker <[email protected]>