Merge changes from topic "presubmit-am-66c2d088f05444b5984eb37e35ba24a0"

* changes:
  [automerge] Implement splitting from Taskbar long-press 2p: abdf25d226 2p: 5c638fdfbe
  [automerge] Implement splitting from Taskbar long-press 2p: abdf25d226
  Implement splitting from Taskbar long-press