Replace the custom WebRTC implementation with LiveKit for improved
stability and feature support.
- Remove `react-native-webrtc` and custom `WebRTCManager`
- Implement `LiveKitService` for room and track management
- Update `callStore` to handle LiveKit events and connection states
- Refactor `CallScreen` (mobile and web) to use `@livekit/react-native`
and `VideoView`
- Update WebSocket protocol to use `call_ready` instead of manual SDP/ICE
exchanges
- Add necessary camera and microphone permissions to `app.json`
- Update Metro and Babel configurations for LiveKit compatibility
Integrate Huawei Maven repository and AGConnect plugin into settings.gradle using the withSettingsGradle helper. This ensures the necessary repositories and plugin management are correctly configured for Huawei Push services.
