Rework state management for audio calls
Rework state management for audio calls

No need to try to keep local state, just use toxav_get_call_state().
We now can auto-accept calls by pre-attaching on the call_out FIFO.

cmotc/ratox,pranomostro/ratox,kytvi2p/ratox,cmotc/ratox,insanity54/batox,pranomostro/ratox