Originate split select animation from the original icon view instead of the split menu icon

Bug: 226395821
Test: https://recall.googleplex.com/projects/f46cfe9c-8076-4efe-bf8a-b1cc4f1f5e1b/sessions/ed355c4f-b9d3-4b85-870f-2decb0b786db
Change-Id: I7277a9de212328d6f580bff5d28338ea0c058d99