Set Previous Track and Next Track headphone buttons to skip forward 30 seconds and skip backwards 10 seconds

As an audiobook listener I more often want to skip forward 30 seconds or skip backwards 10 seconds. Please include an option to have headphone buttons do this instead of Next/Previous track. Most audiobook players allow this.

Addendum to this:
A toggle to hide these buttons for us non-audiobook listeners would be great!

Please open a dedicated thread for all the changes to now playing, while I’ll probably won’t propose each button toggle, there’s plan to propose different ones but need more details to build them.