Merge "Diagnosing when only SysUI is visible." into sc-v2-dev am: 2be2590698 am: a14e10942a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15375786

Change-Id: I6f7d0519871e4a19bc33ed03f1f36ef762dccb11