Android works in the same way as iOS do, but it needs the absolute URL of your files.
If there is no icon that matches the recommended size for the device, the smallest icon larger than the recommended size is used. If there are no icons larger than the recommended size, the largest icon is used.
UPDATED for Lollipop (and tested!)
* Tested on JellyBean, KitKat and Lollipop with Chrome.