Merge "Add accessibility announcement when user clicks on 'Add automatically...

Merge "Add accessibility announcement when user clicks on 'Add automatically to home screen' button" into sc-dev am: 972ab932

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15242979

Change-Id: Iecffb70e9ff27f9583067ceb5f292bef96b76c2e