[Feature] Add support for videos with multiple audio tracks

[echo6ix]

Is your feature request related to a problem? Please describe.
It is not uncommon that media rips contain multiple audio tracks (eg. default track and director's commentary). There is currently no method to indicate and select audio tracks on videos that have more than one audio track.

Describe the solution you'd like

• When multiple audio tracks are detected display an icon to indicate there are multiple tracks, and allow the user to click it to select a track
• In the file info nav tab, display the multiple tracks and their names, for example:
  Audio track 1. Stereo - [English]
  Audio track 2. Commentary - [English]

[YurikaL]

Multiple audio tracks and advanced video playback in general are best suited for native external players such as mpv. Offloading video playback to such an external player would be the best solution for audio track switching support. Vote for external remote players support at #2747!

[seducingbits]

Would love support for multiple audio tracks.

Related/Duplicate of: #1058

[smegmarip]

If multi-track audio playback is beyond the current project scope, what about giving users the option to select a preferred audio track language when importing and transcoding media?