Merge "Update side stage outline visibility with swipe gesture" into sc-v2-dev am: b001ce602f am: 6d6c9de783

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15903128

Change-Id: I82bbca3b2d5bbecdaff5ba6627c87d30f69b227d