[TIMOB-5647] MobileWeb: Ti.Platform.canOpenURL method not returns false if URL is unavailable

Ti.Platform.canOpenURL method not returns false if URL is unavailable. When URL is available method returns true, if not browser generates an 404 error. Returns true when URL = '\images', returns nothing and generates 404 error when URL = '\ima'. If URL='http://appcelerator.com' method returns true but when URL='http://google.com' it generates error:XMLHttpRequest cannot load http://google.com/. Origin http://html5 is not allowed by Access-Control-Allow-Origin.

var win = Ti.UI.currentWindow;

var ta = Ti.UI.createTextArea({
	value: 'Please enter an url',
	width: 200,
	height: 100,
	backgroundColor: '#FFF',
})

var but = Ti.UI.createButton({
	title: 'check',
	top: 110,
	width: 100,
	height: 45
});

win.add(but)
win.add(ta);

but.addEventListener('click', function(){
	ta.value = Ti.Platform.canOpenURL(ta.value);
});