Merge "Support alt+tab for desktop tasks" into udc-qpr-dev am: 40f9151ff0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23335955

Change-Id: Iaf228d32bd7f9c44ba84da8438f40e8b65aec59f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>