CustomDialogController系统弹框在HarmonyOS上面有蒙层，如何去除HarmonyOS上系统弹框的蒙层，保留应用弹框的蒙层

代码如下：

private showUnOpenDeveloperModeAlertDialog(): void {
  Logger.info(TAG, 'showUnOpenDeveloperModeAlertDialog entry');
  try {
  const unOpenDeveloperModeDialog = new CustomDialogController({
    autoCancel: false,
    builder: AlertDialog({
      primaryTitle: $r('app.string.un_open_developer_mode_title'),
      content: $r('app.string.un_open_developer_mode_content'),
      primaryButton: {
        value: $r('app.string.enterprise_dialog_known'),
        action: () => {
          Logger.info(TAG, 'showUnOpenDeveloperModeAlertDialog got it');
          unOpenDeveloperModeDialog.close();
          this.session.terminateSelf();
        }
      }
    })
  })
  unOpenDeveloperModeDialog.open();
} catch (e) {
  Logger.error(TAG, `showUnOpenDeveloperModeAlertDialog error = ${JSON.stringify(e)}`);
  this.session.terminateSelf();
}
}
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