e2e: fix resume/full-reconnect. (#194)

* fix: full re-connect.

* chore: Reset fullReConnect state after ConnectionState is emitted.

* Support full reconnect, fix Migration, NodeFailure, FullReconnect test cases.

* revert Timeouts.connection.

* update.

* Refactor the resume/reconnect implementation.

* more changes.

* update.

* Changed to simpler reconnect/recovery logic.

* update.

* update.

* code format.

* tidy.

* bump version for flutter-webrtc.

* chore: Remove unused exception class (SignalReconnectError).

* chore: rename `fullReconnectOnNext` to `fullReconnect`.

* update.

* chore: Revert changes for `unpublishTrack`.

* chore: Reconnect signalClient when resumeConnection.

* revert `rethrow` in engine.connect.

* Use removePublishedTrack instead of unpublishTrack (RemoteParticipant).

* chore: Correctly handle PeerConnectionState for resume/full-reconnect.

* tidy.

lib/src/participant/participant.dart

@@ -39,7 +39,7 @@ abstract class Participant<T extends TrackPublication>
   double audioLevel = 0;
 
   /// Server assigned unique id.
-  final String sid;
+  String sid;
 
   /// User-assigned identity.
   String identity;
@@ -160,7 +160,7 @@ abstract class Participant<T extends TrackPublication>
   void updateFromInfo(lk_models.ParticipantInfo info) {
     identity = info.identity;
     _name = info.name;
-    // participantSid = info.sid;
+    sid = info.sid;
     if (info.metadata.isNotEmpty) {
       _setMetadata(info.metadata);
     }
@@ -189,7 +189,8 @@ abstract class Participant<T extends TrackPublication>
   Future<void> unpublishTrack(String trackSid, {bool notify = true});
 
   /// Convenience method to unpublish all tracks.
-  Future<void> unpublishAllTracks({bool notify = true}) async {
+  Future<void> unpublishAllTracks(
+      {bool notify = true, bool? stopOnUnpublish}) async {
     final trackSids = trackPublications.keys.toSet();
     for (final trackid in trackSids) {
       await unpublishTrack(trackid, notify: notify);