Merge "Add tests for LPH override for 3 button mode Taskbar." into udc-qpr-dev am: 3289e4fa35 am: 294a40b1be

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24607784

Change-Id: Id8ba2e642aad256612f21e6026adbf5c2e756123
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>