Merge "Allow Taskbar stashing for external tests" into tm-qpr-dev am: 418b1f8e82

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19611434

Change-Id: If0c7eef8169237721cc4d62885d10f23d19d11e1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>