For identity Accept-Encoding (#1237)

If the server returns gzip encoding, the size check will fail because getContentLength() could potentially return -1 for gzipped content.

android/app/src/main/java/com/microsoft/codepush/react/CodePushUpdateManager.java

@@ -163,6 +163,7 @@ public class CodePushUpdateManager {
         try {
             URL downloadUrl = new URL(downloadUrlString);
             connection = (HttpURLConnection) (downloadUrl.openConnection());
+            connection.setRequestProperty("Accept-Encoding", "identity");
             bin = new BufferedInputStream(connection.getInputStream());
 
             long totalBytes = connection.getContentLength();
@@ -365,4 +366,4 @@ public class CodePushUpdateManager {
     public void clearUpdates() {
         FileUtils.deleteDirectoryAtPath(getCodePushPath());
     }
-}
+}