Merge "DO NOT MERGE: ActivityManager#killBackgroundProcesses can kill caller's own app only" into rvc-dev am: 5d498964

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20309299



Change-Id: Iff034ff6ecce1d42d92683f630ca68dbaca554b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>