Load animation for freeform windows.

Now that freeform window is also organized (although via a very simple
organizer), we should add it here in this check to make sure it still
loads animation correctly here in the framework.

Bug: 183906797
Test: Enter Freeform mode, tap on X - window now animates instead of
just disappear

Change-Id: Ica8de041e571510dcfc9f01f17ee87dc0467a1f1