[BUG] can listen mant time values in a moment

[huangjiaxiang]

Describe the bug after resumeCamera, can listen mant time values in a moment

Device (please complete the following information):

• Device: [e.g. iPhone13]
• OS: [e.g. iOS16]

Code: controller.scannedDataStream.listen((scanData) { controller.pauseCamera(); print('+++++++++++${scanData.code}');

  Future.delayed(Duration(milliseconds: 1000), () async {
    print('---------------${scanData.code}');
    result = scanData;
    await controller.resumeCamera();
  });
});