Merge "Quickswitch with staged split" into sc-v2-dev am: 461a6cffd9 am: 547ec80547

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15728604

Change-Id: I7fd68247e1b49f4e06038ec3b5695a7e62b985d4