Fix auto bitrate issues

[nielsvanvelzen]

Changes

• Use detectBitrate function from the SDK to calculcate the "auto bitrate"
  • The function gives better results as the old apiclient did but the results are still low because the server API has a low limit making it hard to test the bitrates
• Set default value for max bitrate to 100 (Mbit/s) instead of 0 (auto)
• Use bitrate settings for music playback

Issues

Fixes #736

[crobibero]

If the server endpoint is the limiting factor on upload size we can just change the limit for that endpoint

[nielsvanvelzen]

I think increasing the limit should allow for better measurements as right now it maxes out at 10mb: (https://github.com/jellyfin/jellyfin/blob/master/Jellyfin.Api/Controllers/MediaInfoController.cs#L314)

While large media can easily use 20mbps