This is the "type" of the recording, but sadly we already have "type"
with a slightly different meaning (i.e. the SSRC in hex for single
streams), so we name this the recording "kind".
Change-Id: I2f7c36e42f7eb075a4324e9659d2845ab40b4f07
Keep track of how many streams have been added to the DB for each call.
Then at the end of the call, if there are no corresponding streams in
the DB, delete the entry for the call instead of marking it as complete.
This eliminates DB entries for calls that were cancelled or failed.
Change-Id: Id2eccd555a0801b4a8cc56299fe49ea2899c4826