[TIMOB-25692] Windows: Pickers populated at run time do not fire change events

<Alloy>
	<Window id="win" class="container">
		<Label id="label" onClick="createPicker">Create Picker</Label>
		<Label id="label2" onClick="populatePicker">Populate Existing Picker</Label>
		<Picker id="picker"/>
	</Window>
</Alloy>

function populatePicker(e) {
	var column = Ti.UI.createPickerColumn();
	var pickerRow1 = Ti.UI.createPickerRow({
		title: 'One'
	});
	var pickerRow2 = Ti.UI.createPickerRow({
		title: 'Two'
	});
	column.addRow(pickerRow1);
	column.addRow(pickerRow2);
	$.picker.add([column]);
}

function createPicker(e) {
	var picker = Ti.UI.createPicker({
		top: 200,
		width: Ti.UI.FILL,
		height: 60,
		backgroundColor: 'white'
	});
	$.win.add(picker);
	var column = Ti.UI.createPickerColumn();
	var pickerRow1 = Ti.UI.createPickerRow({
		title: 'One'
	});
	var pickerRow2 = Ti.UI.createPickerRow({
		title: 'Two'
	});
	column.addRow(pickerRow1);
	column.addRow(pickerRow2);
	picker.add([column]);
	picker.addEventListener('change', function(){
		alert('Created Picker Changed');
	});
}

$.win.open();

$.picker.addEventListener('change', function(){
	alert('Populated Picker Changed');
});

".container": {
	backgroundColor:"red"
}

"Label": {

	width: Ti.UI.SIZE,
	height: Ti.UI.SIZE,
	color: "#000"
}

"#label": {
	top: 100,
	font: {
		fontSize: 12
	}
},
"#label2": {
	top: 400,
	font: {
		fontSize: 12
	}
},
"#picker":{
	top: 500,
	width: Ti.UI.FILL,
	height: 60,
	backgroundColor: 'white'
}