Rewrite PlaybackManager with SDK

[nielsvanvelzen]

Now that #4438 is merged I could finally finish this one.

Changes

• Rewrite PlaybackManager in Kotlin using our "new" SDK
• Removes a lot of custom code for manually creating streams that was no longer in use
  • Half of it was for the previous external player code 🙃
• Removes the last remaining API calls using the old java apiclient
  • Upcoming PR will remove it entirely!!!!!
• Rewrite device profile with same sub-optimal behavior using the SDK's profile builder (much more readable now!)
• Fix max bitrate not always set correctly in device profile
• Fix playback reporting in legacy player shouldn't be cancellable
  • This would sometimes cause the "playback stopped" message to not arrive on the server

Be aware there may be some bugs, I've done some initial testing and everything seems to be working. Some things that will need some further testing: multi-version video, live TV, strm files, external subtitles, switching subtitle/video tracks, remuxing (was unable to trigger non-transcode remux myself).

Additional changes will be done in separate PR's so we can move forward removing the apiclient.

Issues

[github-advanced-security]

detekt found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.