… callback

…ext, add unawaited

…limitation

…calDescription crash

WT-986

…State

… comment

When both peers enable video simultaneously, both fire onRenegotiationNeeded
while in stable state, creating a race where each sends a local offer before
receiving the other's offer. This leaves both PCs in have-local-offer when
__onCallSignalingEventUpdating fires, causing setRemoteDescription to fail
with "Called in wrong state: have-local-offer" and dropping the call.

Fix: check signalingState before setRemoteDescription in the updating handler.
If have-local-offer, rollback the pending local offer first (returning to stable),
then proceed normally. libwebrtc will re-fire onRenegotiationNeeded once the
connection returns to stable after the answer completes.

…otiation

Two separate races during simultaneous video-enable from both peers (glare):

1. RenegotiationHandler: setLocalDescription(offer) fails with "wrong state"
   when a concurrent __onCallSignalingEventUpdating calls setRemoteDescription
   between the TOCTOU guard and setLocalDescription. Previously escalated to
   callErrorReporter (user-visible error). Now caught as a transient race and
   logged at WARNING only — libwebrtc keeps [[NegotiationNeeded]] set and will
   re-fire onRenegotiationNeeded once the PC returns to stable.

2. __onCallSignalingEventUpdating: UpdateRequest(answer) rejected by server
   with 448 "SDP type answer is incompatible with session status incall" during
   glare, because the server is still processing the phone's own pending offer.
   Previously propagated out of the inner try-catch and triggered
   _ResetStateEvent.completeCall, dropping the call. Now caught specifically as
   WebtritSignalingErrorException and logged as a non-fatal warning. The PC local
   offer/answer exchange is already complete, media continues to flow, and the
   pending [[NegotiationNeeded]] causes RenegotiationHandler to re-offer once the
   server settles to incall state.

…rong state

During a glare race the local offer may be rolled back by
__onCallSignalingEventUpdating before the accepted event arrives.
If the PC is already in stable when the accepted answer jsep is
processed, setRemoteDescription(answer) would throw an uncaught
wrong-state exception and video would silently fail to establish.

Added a signalingState pre-check: if type is answer but PC is not in
have-local-offer, skip setRemoteDescription and log a warning.
RenegotiationHandler will fire a fresh offer on the next
onRenegotiationNeeded and the video exchange completes via that cycle.

Also wrapped setRemoteDescription in on String catch to prevent any
residual state races from propagating as unhandled exceptions.

…ess of server response

In the glare+448 scenario the server sends a CallErrorEvent (code 448) instead of
the expected `updated` event. Without this fix `updating: true` is never cleared
by __onCallSignalingEventUpdated, causing the video UI to stay hidden for the
duration of the call.

Clearing the flag unconditionally at the end of __onCallSignalingEventUpdating is
safe: __onCallSignalingEventUpdated setting `false` when already `false` is a no-op.

…re-fire

After a glare-resolution rollback, libwebrtc fires onAddTrack for the
incoming video track but does NOT re-fire onAddStream (onAddStream fires
only once per unique stream ID). The BLoC was relying solely on onAddStream
to update remoteStream, so the video overlay was never mounted and the
renderer was never attached to the stream.

Two complementary fixes:
1. remoteVideo now falls back to the logical `video` flag when the stream is
   absent or has no video tracks yet. This ensures RemoteVideoViewOverlay is
   mounted and the RTCVideoRenderer is attached to the stream — once attached,
   the renderer renders any video track that arrives natively, including tracks
   added after the initial onAddStream.
2. onAddTrack is now forwarded as a streamAdded event so the BLoC updates
   remoteStream when the video track arrives on a different stream object
   (covers cases where Janus creates a new stream for renegotiated video).