Session migration (#72)

* impl

* retry logic

* simulate

* pass checks

* adjust log level

* retry condition

* fix simulate scenario params

* format

* use `RTCPeerConnectionState` instead of `RTCIceConnectionState`

* adjust retry

* additional check for completer

* more logging

* fix id

* pub

* change package

* doc update

* retry tests

* format

* apply suggestions

lib/src/publication/local.dart

@@ -80,4 +80,10 @@ class LocalTrackPublication<T extends LocalTrack> extends TrackPublication<T> {
       logger.fine('Update publishing layers: nothing to change');
     }
   }
+
+  lk_rtc.TrackPublishedResponse toPBTrackPublishedResponse() =>
+      lk_rtc.TrackPublishedResponse(
+        cid: track?.mediaStreamTrack.id,
+        track: latestInfo,
+      );
 }