Gives Traitor AIs the Syndicate Channel!

This PR is intended to support #5283 .
- Traitor AIs, when set as a traitor, will be given a new internal radio
calibrated to hear and transmit to the encrypted syndicate frequency.

Since traitors can buy a headset key for getting the Syndicate Channel,
Traitor AIs can get one too, as they cannot purchase their own TC items.
I had to shuffle a ton of things around just so I can change those two lines. Are you not amused!?!