[TIMOB-19621] tiImage() complete callback is not fired on Android

var self = Ti.UI.createWindow({layout:'vertical', backgroundColor:'#0093b4'});

var aButton = Ti.UI.createButton({title : 'Screen Shot\nAsync',
	height : Ti.UI.SIZE, width : Ti.UI.SIZE,});

aButton.addEventListener('click', function() {
	self.toImage(function(_blob) {
		alert('toImage completed');});
});

self.add(aButton);
self.open();