Merge "Make taskbar accessibility announcement when user is in app only." into...

Merge "Make taskbar accessibility announcement when user is in app only." into tm-qpr-dev am: 6fcdfb16

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/22244591



Change-Id: I7c147e306d91535170485c8cd9c0d0492e8083e7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>