Merge "Let launcher clean-up shell transition leashes" into tm-qpr-dev am: 3cbbaceb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19089545



Change-Id: I7acca2b99ecdcfc66d8b4664e83fa4f07188ef27
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>