Merge "Add hidden flag for allowing system app to use BAL permission to launch pending intent in background" into tm-dev am: 9cb2bb4e am: cb9bd3a1 am: 8dd33829

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18486605



Change-Id: Ieedb16b8637e25599576285e6e6a62ee8293599e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>