Merge "Stash transient taskbar upon icon drag" into tm-qpr-dev am: 793c3715

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20490352



Change-Id: I26e1675d9832f5c80c430450698a908e93951e1e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>