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 am: c6f025aa am: df34bae7

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



Change-Id: I09aeeec9ad9a3a43beb1f6e7b39f7ca9c73030f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>