Sets the local players call channel.
- callChannel: the call channel to join
-- Joins call channel 1
exports['pma-voice']:setCallChannel(1)
-- This will remove them from the call channel
exports['pma-voice']:setCallChannel(0)
addPlayerToCall is provided as a 'easier to read' version of setCallChannel.
-- Joins call channel 1
exports['pma-voice']:addPlayerToCall(1)