[MERGED PR] Add extra items to on-station security closets

[Solenoid]

I like this change, since it gives antags an alternate method to listen on security comms. I don't personally see how it'd interfere with wiretap, since you don't get every channel like you would with wiretap, and wiretap is more of a convenience purchase for when you don't want to/can't break into sec and steal some headsets.