According to Android's docs (https://developer.android.com/reference/java/text/SimpleDateFormat.html)
the `SimpleDateFormat` class in Android does not accept `XXX` as the timezone, it uses `Z` instead.
Also updated the date time format of Android and Java clients to include milliseconds.
* Handle form parameters in a way similar to Java client.
* Handle file uploading.
* Normalize query, header and form parameters with the
ApiInvoker.parameterToString method, which formats Date value to ISO 8601.