Merge "Add a content overlay for auto-enter w/o a source hint rect" into sc-dev am: 8b74cbbf96 am: 854122d6d4 am: 47dc7da52e

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

Change-Id: I4aaabd07083ef0c8a18a1557fe347a80e3f0428b