[AC-2901] Android: Titanium.Network.responseXML string is garbled characters when charset is not utf-8

var xhr = Titanium.Network.createHTTPClient();
xhr.open('GET','http://kangaechu.com/xml/shiftjis.xml');
//xhr.open('GET','http://kangaechu.com/xml/utf-8.xml');

xhr.onload = function(){
    //Ti.API.info(this.responseText);
    var titles = this.responseXML.getElementsByTagName('title');
    Ti.API.info(titles.length);
    for (var i=0; i<titles.length; i++){
    	Ti.API.info(i + " : " + titles.item(i).textContent);
    }
};

xhr.onerror = function(error){
	Ti.API.error(error.toString());
};
xhr.send();