Merge "Add a content overlay for auto-enter w/o a source hint rect" into sc-dev am: 8b74cbbf96 am: 8a7f26fec3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14102623

Change-Id: Ide7109a2cd347b886cb7fad916f903334f02bfe8