feat: add platform channel bridge between Flutter and Android

lib/bridge/location_bridge.dart

@@ -0,0 +1,59 @@
+import 'dart:async';
+import 'package:flutter/services.dart';
+
+class LocationBridge {
+  static const MethodChannel _methodChannel =
+      MethodChannel('com.traccar.client/tracking');
+  static const EventChannel _eventChannel =
+      EventChannel('com.traccar.client/location_updates');
+
+  static Stream<Map<String, dynamic>>? _locationStream;
+
+  static Future<bool> startTracking() async {
+    try {
+      final result = await _methodChannel.invokeMethod<bool>('startTracking');
+      return result ?? false;
+    } on PlatformException catch (e) {
+      print('Failed to start tracking: ${e.message}');
+      return false;
+    }
+  }
+
+  static Future<bool> stopTracking() async {
+    try {
+      final result = await _methodChannel.invokeMethod<bool>('stopTracking');
+      return result ?? false;
+    } on PlatformException catch (e) {
+      print('Failed to stop tracking: ${e.message}');
+      return false;
+    }
+  }
+
+  static Future<bool> updateConfig(Map<String, dynamic> config) async {
+    try {
+      final result =
+          await _methodChannel.invokeMethod<bool>('updateConfig', config);
+      return result ?? false;
+    } on PlatformException catch (e) {
+      print('Failed to update config: ${e.message}');
+      return false;
+    }
+  }
+
+  static Future<Map<String, dynamic>?> getStatus() async {
+    try {
+      final result = await _methodChannel.invokeMethod<Map>('getStatus');
+      return result?.cast<String, dynamic>();
+    } on PlatformException catch (e) {
+      print('Failed to get status: ${e.message}');
+      return null;
+    }
+  }
+
+  static Stream<Map<String, dynamic>> get locationUpdates {
+    _locationStream ??= _eventChannel
+        .receiveBroadcastStream()
+        .map((event) => Map<String, dynamic>.from(event as Map));
+    return _locationStream!;
+  }
+}