[TIMOB-25687] Android: Picker change listener doesn't work the first time

<Alloy>
	<Window class="container" onOpen="open" id="requestWindow" title="title">
		<ScrollView id="scrollView" showVerticalScrollIndicator="true" >
			<View id="infoView" >
				<View width="Ti.UI.FILL" height="40dp" >
					<Label class="labels" id="typeLabel" text="L('type')" />
					<Picker id="pickerType" platform="android" onChange="pickerChange" />
					<View bottom="0" width="Titanium.UI.FILL" height="0.5" backgroundColor="#c8c7cc"></View>
				</View>
				<View width="Ti.UI.FILL" height="40dp" id="halfDayView" >
					<Label class="labels" id="halfDayLabel" text="L('halfDay')" />
					<Picker id="pickerHalfDay" platform="android" onChange="pickerChange" />
					<View bottom="0" width="Titanium.UI.FILL" height="0.5" backgroundColor="#c8c7cc"></View>
				</View>
			</View>
		</ScrollView>
	</Window>
</Alloy>

function open(){
	
}

var halfDay = [];
halfDay[0]=Ti.UI.createPickerRow({title:L('halfDay')});
halfDay[1]=Ti.UI.createPickerRow({title:L('fullDay')});

var type = [];
loadTypes();

function loadTypes() {
	var url = "https://www.google.es";
	var xhr = Ti.Network.createHTTPClient({
		onload : function(e) {
			// var json = JSON.parse(decodeURIComponent(this.responseText));
			
			// var datas = json.datas;
			
			var datas = {
		        "vac_tipos": [
		            {
		                "tipo": "F",
		                "nombre": "Festivos"
		            },
		            {
		                "tipo": "V",
		                "nombre": "Vacaciones"
		            },
		            {
		                "tipo": "U",
		                "nombre": "Puente"
		            },
		            {
		                "tipo": "FF",
		                "nombre": "Festivo Especial"
		            },
		            {
		                "tipo": "NI",
		                "nombre": "DIAS Navidad"
		            }
		        ]
			    
			};
			
			for (var i = 0; i < datas.vac_tipos.length; i++) 
			{
				type[i] = Ti.UI.createPickerRow({title: datas.vac_tipos[i].nombre});
			}
			
			if (OS_ANDROID) 
			{
				$.pickerType.add(type);
				$.pickerType.selectionIndicator = true;
				
				$.pickerHalfDay.add(halfDay);
				$.pickerHalfDay.selectionIndicator = true;
			}
			
		},
		onerror : function(e) {
			Ti.API.debug(e.error);
		},
		timeout : 5000		
	});
	xhr.open("GET", url);
	xhr.send();
}

function pickerChange(){
	Ti.API.info('Change listener triggered');
}

"Window[platform=android]" : {
	windowSoftInputMode: Ti.UI.Android.SOFT_INPUT_STATE_HIDDEN
}

".container": { 
	backgroundColor:"#DCDCDC",
}

"#scrollView": {
	layout: 'vertical'
}
"#infoView" : {
	layout: 'vertical',
	height: Ti.UI.SIZE
}

".labels" : {
	left: "10dp"
}

"Picker[platform=android]" : {
	width: "35%",
	borderColor: 'black',
	borderWidth: '1',
	right: "10dp"
}