DO NOT MERGE Fix divider animation from overview screen

Divider leash is create too quickly to make it show before the
animtation. Fix it by only create leash but don't show it before
animation start and set it to visible after animation end.

Fix: 215322621
Test: manual
Test: pass existing tests
Change-Id: Iaa068d5a6186cac1e1aad4b30d6f5e76943ebd08