decode metadata in conventionalDMR mode

[ZeroChaos-]

Trunk recorder should track the following metadata for conventional DMR:

• caller (already decoded and stored as .srcList[].src
• talkgroup
• private/group/all call (all call is a specific value for group call iirc and can be ignored if you prefer)
• Color Code
• encrypted
• encryption type (not certain if this is known, but I believe it is)
• Slot (all DMR is tdma and should have a slot assigned)
• LCN (logical channel number)
• RAS enabled
• Trunking type (Cap+, CapMax, etc)