fix(JingleSessionPC): execute 'invite' on the queue
fix(JingleSessionPC): execute 'invite' on the queue

Invite must be executed on the queue to avoid strange things happening
on the beginning of the call. For example when the local tracks are
added just after the invite was called.

Move the JingleSessionPC to ACTIVE state, as soon as the first
_renegotiate is executed in PENDING state.

damencho/lib-jitsi-meet,adambowles/lib-jitsi-meet,nevermind-corp/ljm,jiyeyuran/lib-jitsi-meet,jitsi/lib-jitsi-meet,adambowles/lib-jitsi-meet,jitsi/lib-jitsi-meet