调整连接超时时间

lib/modules/pairing/controllers/pairing_controller.dart

@@ -730,7 +730,7 @@ class PairingController extends GetxController with WidgetsBindingObserver {
     try {
       // 设置超时定时器
       _bleTimeoutTimer?.cancel();
-      _bleTimeoutTimer = Timer(const Duration(seconds: 10), () async {
+      _bleTimeoutTimer = Timer(const Duration(seconds: 20), () async {
         final currentBleState = await _bleManager.getConnectionState();
         if (currentBleState == 2) {
           _bleTimeoutTimer?.cancel();