[automerger skipped] DO NOT MERGE Disallow Wallpaper service to launch activity from background. am: 4c065abfaf am: 2ffa1caa42 -s ours am: 8f8162b2fd -s ours am: 7307547848 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24077613

Change-Id: I8e337e7eaea650ce7a65dbe01eecc4f034f05855
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>