Upgrade flutter_rust_bridge to v2.11.1

[alexlapa]

Synopsis

Upgrade flutter_rust_bridge to v2.11.1

Addtionally:

• upgrade freezed
• upgrade ffigen
• fix android:

FATAL EXCEPTION: main
Process: com.instrumentisto.medea_jason_example, PID: 15686
java.lang.IllegalArgumentException: The VideoSink is not allowed to be null
	at org.webrtc.VideoTrack.addSink(VideoTrack.java:33)
	at com.instrumentisto.medea_flutter_webrtc.proxy.MediaStreamTrackProxy$2.invoke(MediaStreamTrackProxy.kt:92)
	at com.instrumentisto.medea_flutter_webrtc.proxy.MediaStreamTrackProxy$2.invoke(MediaStreamTrackProxy.kt:92)
	at com.instrumentisto.medea_flutter_webrtc.proxy.Proxy.replace(Proxy.kt:29)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpReceiverProxy$1.invoke(RtpReceiverProxy.kt:19)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpReceiverProxy$1.invoke(RtpReceiverProxy.kt:19)
	at com.instrumentisto.medea_flutter_webrtc.proxy.Proxy.replace(Proxy.kt:29)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpTransceiverProxy.syncReceiver(RtpTransceiverProxy.kt:178)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpTransceiverProxy.access$syncReceiver(RtpTransceiverProxy.kt:8)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpTransceiverProxy$1.invoke(RtpTransceiverProxy.kt:48)
	at com.instrumentisto.medea_flutter_webrtc.proxy.RtpTransceiverProxy$1.invoke(RtpTransceiverProxy.kt:46)
	at com.instrumentisto.medea_flutter_webrtc.proxy.Proxy.replace(Proxy.kt:29)
	at com.instrumentisto.medea_flutter_webrtc.proxy.PeerConnectionProxy.syncTransceivers(PeerConnectionProxy.kt:490)
	at com.instrumentisto.medea_flutter_webrtc.proxy.PeerConnectionProxy.getTransceivers(PeerConnectionProxy.kt:281)
	at com.instrumentisto.medea_flutter_webrtc.proxy.PeerObserver.onTrack$lambda$5(PeerObserver.kt:70)
	at com.instrumentisto.medea_flutter_webrtc.proxy.PeerObserver.$r8$lambda$aszQdE5C4guEIreXi0SRShzSHDU(Unknown Source:0)
	at com.instrumentisto.medea_flutter_webrtc.proxy.PeerObserver$$ExternalSyntheticLambda5.run(D8$$SyntheticClass:0)
	at android.os.Handler.handleCallback(Handler.java:959)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loopOnce(Looper.java:257)
	at android.os.Looper.loop(Looper.java:342)
	at android.app.ActivityThread.main(ActivityThread.java:9638)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:619)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)
I/Process (15686): Sending signal. PID: 15686 SIG: 9

Checklist

• Created PR:
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  • Documentation is updated (if required)
  • Tests are updated (if required)
  • Changes conform code style
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  • FCM (final commit message) is posted or updated
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  • Milestone is set
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[alexlapa]

FCM:

Upgrade `flutter_rust_bridge` to 2.11.1 version (#237)

Additionally:
- fix exception in `PeerObserver::onTrack`
- upgrade `freezed` and `freezed_annotation` pub packages to 3.1.0 version
- upgrade `ffigen` pub package to 19.0.0 version