Merge "Handle volume key events while in overview" into sc-dev am: 45849e22c9 am: d9b8603dfb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14456869

Change-Id: I6e087b67c3c3673ca7e53b92db1834feba564684