Merge "Allow background activity launch by drag notification" into tm-qpr-dev...

Merge "Allow background activity launch by drag notification" into tm-qpr-dev am: d7e17f97 am: 6d119e6c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19967613



Change-Id: Id8c6fc9c14a1860e9f0a4896f0382e26e7fb048e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>