On lockscreen to quick-settings transition, media-player should fade in to...

On lockscreen to quick-settings transition, media-player should fade in to quick settings instead of just appear.

Bug: 235693437
Test: manual: https://b.corp.google.com/action/issues/235693437/attachments/37965259
Change-Id: I5bddce35cea14ed587c51024e106878c7924bfa4