HarmonyOS 在Flutter插件中怎么把HarmonyOS中的图片二进制流通过MethodChannel传给Flutter

图片二进制流请使用以下方式回传：

import { image } from '@kit.ImageKit';
const imagePackerApi = image.createImagePacker();
const packOptions: image.PackingOption = {
  format: 'image/jpeg',
  quality: 100,
}
let uint8Array: Uint8Array = new Uint8Array(await imagePackerApi.packing(pixelMap, packOptions));
pixelMap.release();
result.success(uint8Array);