Merge "Add accessibility announcement when user clicks on 'Add automatically to home screen' button" into sc-dev am: 972ab9327c am: 04fd845ee3

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

Change-Id: I4d6cc491a79a0bb034fbc360a86e9ad05cb21777