[TIMOB-1954] Android: removeEventListener has no effect when removing from a view in another context

Sample failcase app.js:

/*global Ti, Titanium, alert, JSON */
Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow({  
    title:'Test',
    backgroundColor:'#fff',
    fullscreen: true
});

function clickhandler() {
    Ti.API.info('HELLO');
}

var btn1 = Ti.UI.createButton({
    top: 0,
    title: 'Say hello'
});
btn1.addEventListener('click', clickhandler);

win.add(btn1);

var btn2 = Ti.UI.createButton({
    top: 60,
    title: 'Remove hello click handler'
});
btn2.addEventListener('click', function() {
    btn1.removeEventListener('click', clickhandler);
});
win.add(btn2);
win.open();

Note the fullscreen: true in that script. This makes the window being opened a "heavyweight" window that gets its own activity and context. The code to remove the event listener from one of the buttons on that window is defined in the root context. This causes the removeEventListener to have no effect.

If you take away the fullscreen: true in the window creation arguments, the removeEventListener will succeed.

EXPECTED BEHAVIOR: The "HELLO" message will stop appearing in the console when you click the first button, IF you click the second button at least once.