Handle ActivityEmbedding container in remote transition adapter

1. When embedded TaskFragment is open/close with Task, we should only
   animate the Task.
2. When there is only a non-fullscreen embedded TaskFragment in the
   transition, we don't want to animate it, otherwise it may only
   animate partial of the Task.

Fix: 260156661
Test: verify with opening Settings from quick settings.
Change-Id: I6f3ae7c880ddbb17b33040c9ba19beb4d865fc35