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: Ib843f34fb3e5be638c1816a22c579d9f2268bbb8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>