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

Merge "Fix the race condition between creating and killing process group" into udc-dev am: c601737f

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



Change-Id: Ic6263f1a6362009e254b6734d0b08481748c5f04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>