Add audio tracks and subtitles analytics

[waliid]

Description

This PR allows us to send the analytics related to audio tracks and subtitles to CommadersAct.

Changes made

• The following labels are now sent:
  • media_audio_track
  • media_subtitles_on
  • media_subtitle_selection

Checklist

• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).
• The playground has been updated (if relevant).