Merge "Hide split option if task is not dockable" into tm-qpr-dev am: c012c538

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/19087427



Change-Id: I94e45ead43c5450cd093b2273995bf0f5e36d3af
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>