Implement split from workspace to workspace

Fixes: 239824922
Test: https://recall.googleplex.com/projects/f46cfe9c-8076-4efe-bf8a-b1cc4f1f5e1b/sessions/b745433d-cba7-4f7a-a28d-4223d9950c0b
Change-Id: I9bfd5844bb9ccb6e65e77fedb7fbccb37692f812
8 files changed