Android AWS S3 TransferUtility以静默方式忽略ClientConfiguration中的代理设置

I'm using the AWS SDK for Android to download objects from S3 to my Android tablet. In an attempt to route traffic through a proxy (right now I'm using Charles Proxy on my local network as a test bed) to throttle the download speed of the S3 downloads, I'm using ClientConfiguration.setProxyHost and setProxyPort but the S3 TransferUtility appears to be ignoring the setting and going directly to AWS S3 not the proxy.I'm using the AWS SDK for Android to download o