Merge "Stash taskbar on swipe to go home for 3p fallback launcher." into tm-qpr-dev am: f00e831f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/22424377



Change-Id: I04e48379582caf6a102774c5e15dc40993580f3b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>