title: Is it possible to make an animation icon on the notifications window (Android)
body: <p>I have done some research and found that it's possible to have a progress bar in the expanded statusbar area but I am still not sure about whether the animation icon is possible or not. 
  I have tried the answer of this question: <a href="https://stackoverflow.com/questions/4688052/animation-in-notification-bar-cutsom-view">Animation in Notification bar Custom View</a>. However, the icon is not animated.
  If it's not possible, could you point me to any documentation that confirms that?
  Thanks in advance.</p>