Merge "Freeze all package processes before killing" into tm-dev am: 430761bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18189048



Change-Id: I159d4ae7ff876efe813a17797be1f7e6ee56ef2f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>