* Update entity registry handling
* Add and use fixtures to test setup via config entry
* Remove legacy redundant tests
* Remove unnecessary mock_coro
* Remove unnecessary namespace change
* Move zeroconf payload to fixture
* Begin adding Sonos to codecov
* Mock proper return value
* Revert return value for platform
* Move Plex->Sonos playback service from integration to platform
* Test against 'native' Plex media_players
* Add Plex to Sonos after_dependencies
* Remove circular dependency
* Raise exceptions in failed service calls
* Add test to forward service call from Sonos
* Additional Sonos->Plex tests
* Fix docstring
jjlawren