Merge "add post_notification permission to manifest so the package can send...

Merge "add post_notification permission to manifest so the package can send notifications on T+" into tm-dev am: 2a61825f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DocumentsUI/+/18756497



Change-Id: I1ddfd3f110ce528bcd26067af68a6d9e7d4126be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>