Merge "Restrict activity launch when caller is running in the background" into sc-dev am: d75dd811c5 am: 59dc1375f4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23183708

Change-Id: Ie9f421e5ada5c53d364e0cda719dfd8e2424b048
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>