Draft: Follow up to call-types MR
Follow up to !507 (merged)
I'm not 100% sure if I like the call-types as they are, specifically I'm wondering if it wouldn't be better to
have a separate call type CALLS_CALL_TYPE_SIP_TELEPHONY
because without it the call details (!508, #222)
would need to look at both the protocol used and the call type to infer SIP Phone Call
as opposed to SIP Voice Call
(or whatever the actual strings end up being)