A few small bugfixes (#818)

A few small bugfixes (#818)

* Make sure that file/library items never get cached

* fix typo

* fix end of queue reached in cast provider + title

* Prefer album image for tracks

* fix keyerror on non existent YTmusic track

* Fix enqueueing logic

* prevent enqueue next track if MA is not the active source

* prevent unmount log at startup

* cleanup only on coordinator

* fix typo

* fix typo

* use flac as intermediate codec to airplay bridge