[automerger skipped] DO NOT MERGE: Fix ActivityManager#killBackgroundProcesses permissions am: 9a14267036 -s ours am: c2318438d7 -s ours am: f2bedc6928 -s ours am: 23fd74ed2e -s ours am: c726616bde -s ours am: fbf27d765a -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25124582

Change-Id: I5b495af4b7f7a1cc6a80a27977feb8093354459f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>