feat(call): implement CallKeep integration and enhance group call support

Integrate `expo-callkit-telecom` to support native system call handling (answering, ending, and muting via system UI). This includes a new `callKeepService` and a `CallKeepBootstrap` component to manage the lifecycle of system call events.

Additionally, improves the calling experience by:
- Adding support for group calls with participant tracking and UI indicators.
- Enhancing LiveKit integration by replacing polling with event-driven video track synchronization.
- Updating `WebSocketService` to prevent disconnection when the app enters the background during an active call.
- Adding new WebSocket message types for participant join/leave events and group invites.
- Refining call UI components (`CallScreen`, `FloatingCallWindow`, `IncomingCallModal`) for better visual feedback and safe area handling.

Refactor LiveKit service to use event-driven updates for local and remote tracks, improving performance and reliability.

src/screens/profile/DataStorageScreen.tsx

@@ -107,9 +107,9 @@ export const DataStorageScreen: React.FC = () => {
 
       const keys = await AsyncStorage.getAllKeys();
       if (keys.length > 0) {
-        const items = await AsyncStorage.multiGet(keys);
+        const items = await AsyncStorage.getMany(keys);
         let totalSize = 0;
-        for (const [, value] of items) {
+        for (const value of Object.values(items)) {
           if (value) {
             totalSize += value.length * 2;
           }