[TIMOB-9195] Android: imageView Rotation always starts over from 0 degrees

var win = Ti.UI.createWindow({
    backgroundColor : 'gray'
});

var iv = Ti.UI.createImageView({
    image : '/images/circ.png',
    top : 100 - 480
});

var gTrans = Ti.UI.create2DMatrix();

win.add(iv);

var btn = Ti.UI.createButton({
    title : 'amin it',
    top : 400
});

btn.addEventListener('click', function() {
    gTrans = gTrans.rotate(20);
    var a = Ti.UI.createAnimation({
        duration : 1000
    });
    a.transform = gTrans;
    iv.animate(a);
});
win.add(btn);

win.open();