AVBrowser连接AVBrowserService失败

按照官网文档写的demo，连接不上，以下是代码

AvController：

ElementName elementName = new ElementName("", "com.example.myapplication", "com.example.mediademo.AVService");
// connectionCallback在调用avBrowser.connect方法后进行回调。
avBrowser = new AVBrowser(getAbility(), elementName, connectionCallback, null);
// avBrowser发送对媒体浏览器服务的连接请求。
avBrowser.connect();

if(avBrowser.isConnected()){
    Logger.getGlobal().info("###  isConnected");
}else{
    Logger.getGlobal().info("###  notConnect");
}
// 将媒体控制器注册到ability以接收按键事件。
AVController.setControllerForAbility(getAbility(), avController);

config：

{
  "app": {
    "bundleName": "com.example.myapplication",
    "vendor": "example",
    "version": {
      "code": 1,
      "name": "1.0"
    },
    "apiVersion": {
      "compatible": 4,
      "target": 4,
      "releaseType": "Beta1"
    }
  },
  "deviceConfig": {},
  "module": {
    "package": "com.example.mediademo",
    "name": ".MyApplication",
    "deviceType": [
      "phone",
      "tv",
      "tablet"
    ],
    "reqPermissions": [

      {
        "name": "harmonyos.permission.READ_MEDIA"
      },
      {
        "name": "ohos.permission.INTERNET"
      },
      {
        "name": "harmonyos.permission.INTERNET"
      },
      {
        "name": "ohos.permission.GET_NETWORK_INFO"
      },
      {
        "name": "ohos.permission.INTERNET"
      },
      {
        "name": "ohos.permission.READ_USER_STORAGE"
      },
      {
        "name": "ohos.permission.WRITE_USER_STORAGE"
      },
      {
        "name": "ohos.permission.DISTRIBUTED_DATASYNC"
      },
      {
        "name": "ohos.permission.DISTRIBUTED_DEVICE_STATE_CHANGE"
      },
      {
        "name": "ohos.permission.GET_DISTRIBUTED_DEVICE_INFO"
      },
      {
        "name": "ohos.permission.GET_BUNDLE_INFO"
      }
    ],
    "distro": {
      "deliveryWithInstall": true,
      "moduleName": "MediaDemo",
      "moduleType": "feature"
    },
    "abilities": [

      {
        "orientation": "unspecified",
        "visible": true,
        "name": "com.example.mediademo.MainAbility",
        "icon": "$media:icon",
        "description": "$string:mainability_description",
        "label": "MyApplication",
        "type": "page",
        "launchType": "standard",
        "skills": [
          {
            "entities": [
              "entity.system.home"
            ],
            "actions": [
              "action.system.home",
              "action.audioplay",
              "action.audiorecord",
              "action.soundplay",
              "action.videoplay",
              "action.image",
              "action.wlan",
              "action.bluetooth"
            ]
          }
        ]
      },
      {
        "name": "com.example.mediademo.AVClientAbility",
        "icon": "$media:icon",
        "description": "avccontroller",
        "type": "page",
        "visible": true,
        "launchType": "standard",
        "skills": [
          {
            "actions": [
              "ability.123"
            ]
          }
        ]
      },
      {
        "name": "com.example.mediademo.AVService",
        "icon": "$media:icon",
        "description": "AVBrowserService",
        "type": "service",
        "skills": [
          {
            "actions": [
              "action.media.browse.AVBrowserService"
            ]
          }
        ]
      }
    ]
  }
}

执行结果：

connectioncallback没有任何回调反应，包括onConnectFailed

log显示 ###  notConnect

是哪里配置有问题吗？