@VisibleForTesting
  static HttpURLConnection openConnectionTo(Uri uri) throws IOException {
    URL url = UriUtil.uriToUrl(uri);
    return (HttpURLConnection) url.openConnection();
  }
Network fetcher that uses the simplest Android stack.

<p>Apps requiring more sophisticated networking should implement their own {@link
NetworkFetcher}.
imagepipeline/src/main/java/com/facebook/imagepipeline/producers/HttpUrlConnectionNetworkFetcher.java