Merge "Stash transient taskbar upon icon drag" into tm-qpr-dev am: 793c3715 am: 244d4809

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



Change-Id: Ie56880bc1bcc4c116bcc5009cf77c5261384208c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>