[MAP] AI's Common Channel intercom mic starts off.

Edits Box and MetaStation maps so that all three AIs start with the
microphone on their Common Channel intercoms off.

This partially addresses #5860. I wanted to keep this PR a pure map
change, as dealing with maps is a pure nightmare for both me and any
other coders with a map PR.

Full solution for the arrivals announcement and law broadcasts will be
in another PR.

*MiniStation map not included as I am not able to open it.*