fix(android): fix noresults event in ListView with custom query

[m1ga]

When using a custom Ti.UI.Textfield for a search view the noresults event is not fired.
The issue is that it is just checking for filterQuery which is not set when you use listView.searchText = "". This PR will set that value which makes the noeresults event fire again.

var win = Ti.UI.createWindow({layout: "vertical"});
var searchView = Ti.UI.Android.createSearchView();

var txtSearch = Ti.UI.createTextField({
	left: '80dp',
	right: '55dp',
	top: 0,
	backgroundColor: 'red',
	borderStyle: Titanium.UI.INPUT_BORDERSTYLE_NONE,
	height: '40dp', //my change
	hintText: "Search from drinks",
	borderStyle: Titanium.UI.INPUT_BORDERSTYLE_NONE,
	returnKeyType: Titanium.UI.RETURNKEY_SEARCH,
	id: "txtSearch"
});

win.add(txtSearch);

var listView = Ti.UI.createListView({});
listView.addEventListener("noresults", function() {
	console.log("no results")
})
txtSearch.addEventListener('change', function(e) {
	listView.searchText = e.value.toLowerCase();
});
var sections = [];
var fruitDataSet = [{	properties: {searchableText: "foo",title: 'Apple'}}, {properties: {searchableText: "foo",title: 'Banana'}}];
var fruitSection = Ti.UI.createListSection({headerTitle: 'Fruits',items: fruitDataSet});
sections.push(fruitSection);
var vegDataSet = [{properties: {searchableText: "foo",title: 'Carrots'}}, {properties: {searchableText: "foo",title: 'Potatoes'}}];
var vegSection = Ti.UI.createListSection({headerTitle: 'Vegetables',items: vegDataSet});
sections.push(vegSection);
listView.sections = sections;
var fishDataSet = [{properties: {searchableText: "foo",title: 'Cod'}}, {properties: {searchableText: "foo",title: 'Haddock'}}];
var fishSection = Ti.UI.createListSection({headerTitle: 'Fish',	items: fishDataSet});
listView.appendSection(fishSection);
win.add(listView);
win.open();