feat: add skip muxer negotiation

[achingbrain]

Some transports have their own muxers but use existing encrypers to do a handshake so skip sending muxer lists as it is not necessary.

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works