Merge "[pm] fix crash caused by race condition onUidGone" into udc-dev am: a3aa00e29c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23678532

Change-Id: Icda09765844a5d682cc28fda06f7cd5f49c9199e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>