Merge "Add a content description for the widget reconfigure button." into sc-dev am: 0dfabe0a1e am: a326c763eb

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

Change-Id: Ideee5ffa8610cb676f26dada57ff8a76b6222841