[TIMOB-1272] Android: ImageView does not support children

Label shows in iPhone, not in Android:

var iv = Ti.UI.createImageView({
  top: 0,
  width: 100,
  left: 0,
  height: 200
});

win.add(iv);

var l = Ti.UI.createLabel({
  left: 0,
  top: 0,
  width: 100,
  height: 40,
  text: 'test'
});

iv.add(l);