feature: 统一调用类方式

devices/ble_manager.js

@@ -271,7 +271,7 @@ class bleManager {
       }
 
       ///做搜索蓝牙适配器权限
-      const permission_util = require('../utils/permission_util');
+      const permission_util = require('./../utils/permission_util');
       var available = await permission_util.openBluetoothAdapter();
       that.isAvailable = available;
       if (!available) {