Merge "Add a content description for the widget reconfigure button." into sc-dev am: 0dfabe0a1e am: c9565c2444 am: fb0eab88b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14690881

Change-Id: Ibc0ea1eee4f8568f3bb69bcea45fbf23495dde53