[2020] Allow Players to Change Audio Levels

With all the new additions to this season, it's unfortunate to see that there hasn't been a change to the audio controls in this game.

Currently we have the following SFX and audio bits that are unable to be independently customised:

1. Ambient POI music
2. Punchcard SFX
3. Level up SFX
4. Quick Challenge Jingle

These various sounds when combined with gunshots, footsteps, and voice chat, can make audio very overwhelming and difficult to comprehend while fighting. Allowing players to customise these settings is a worthwhile QOL change that could benefit a range of players.

Hopefully this gets seen by the community managers and can be considered 👍