[TIMOB-2776] Android: Animation callback is called multiple times.

See log.

var win = Ti.UI.createWindow({
    navBarHidden: true,
    exitOnClose: true,
    backgroundColor: '#fff'
});

var view = Ti.UI.createView({
    width: 50,
    height: 50,
    left: 0,
    top: 0,
    backgroundColor:'#f00'
});

var animateBtn = Ti.UI.createButton({
    left: 10,
    right: 10,
    height: 50,
    title: 'Animate'
});

animateBtn.addEventListener('click', function(e) {
    view.animate({
        top: Ti.Platform.displayCaps.platformHeight - view.height,
        left: Ti.Platform.displayCaps.platformWidth - view.width,
        duration: 1000
    },
    function(e) {
        Ti.API.info('This is called multiple times.');
    });
});

win.add(animateBtn);
win.add(view);
win.open();