Merge "Set split button drawable to start instead of left" into tm-qpr-dev am: 346b970942

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21566803

Change-Id: I8c40f21252aedc829cab8de34f77b137ff8529cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>