HarmonyOS 使用web嵌入h5地址，h5里面视频摄像头，无法打开摄像头

参考示例如下：

import web_webview from '@ohos.web.webview';
import abilityAccessCtrl, { PermissionRequestResult, Permissions } from '@ohos.abilityAccessCtrl';

@Entry
@Component
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController()

  aboutToAppear() {
    // 配置Web开启调试模式
    web_webview.WebviewController.setWebDebuggingAccess(true);
    let atManager = abilityAccessCtrl.createAtManager();
    atManager.requestPermissionsFromUser(getContext(this), ['ohos.permission.CAMERA', 'ohos.permission.MICROPHONE'])
      .then(data => {
        let result: Array<number> = data.authResults;
        let hasPermissions1 = true;
        result.forEach(item => {
          if (item === -1) {
            hasPermissions1 = false;
          }
        })
        if (hasPermissions1) {
          console.info("hasPermissions1")
        } else {
          console.info(" not hasPermissions1")
        }
      }).catch(() => {
      return;
    });
  }

  build() {
    Column() {
      Web({ src: 'https://xxx ', controller: this.controller })
        .domStorageAccess(true)
        .javaScriptAccess(true)
        .fileAccess(true)
        .onPermissionRequest((event) => {
          if (event) {
            AlertDialog.show({
              title: 'title',
              message: 'text',
              primaryButton: {
                value: 'deny',
                action: () => {
                  event.request.deny()
                }
              },
              secondaryButton: {
                value: 'onConfirm',
                action: () => {
                  event.request.grant(event.request.getAccessibleResource())
                }
              },
              cancel: () => {
                event.request.deny()
              }
            })
          }
        })
    }
  }
}