1.解决连接热点wifi网络下载失败的问题，必须要开启允许流量计费下载。

Signed-off-by: zhoulisheng1 <zhoulisheng1@huawei.com>

imageknife/src/main/ets/components/imageknife/networkmanage/NetworkDownloadClient.ets

@@ -34,6 +34,8 @@ export class NetworkDownloadClient {
     var downloadConfig = {
       url: (request.loadSrc as string),
       filePath: allpath,
+      // 允许计费流量下载
+      enableMetered: true,
     };
     let loadTask = null;
     loadRequest.download(globalThis.ImageKnife.getImageKnifeContext(), downloadConfig).then(downloadTask => {