Merge "Add Split button in OverviewActions" into sc-v2-dev am: b862d2c30f am: 1f41b44e14

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15587782

Change-Id: I8c902ee15eef2361b4e1b122edb6b74e53b2938d