Merge "Merge "Fix the race condition between creating and killing process...

Merge "Merge "Fix the race condition between creating and killing process group" into udc-dev am: c601737f am: c6f025aa am: df34bae7" into udc-qpr-dev-plus-aosp am: ee14c352

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22970327



Change-Id: If3b1eae2b501484089d135cf15469955836752cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>