title: Notification icon is greyed out
body: <p>I created an image in a 96x96 size, gave padding of 4px on all sides following this <a href="http://iconhandbook.co.uk/reference/chart/android/" rel="noreferrer">information</a>.</p>
  
  <p>Then I used <a href="https://romannurik.github.io/AndroidAssetStudio/index.html" rel="noreferrer">Android Asset Studio</a> to generate icons for different screens. But when I used these in my Notification Builder it is showing a grey box. Where am I doing wrong?</p>
  
  <p><a href="http://i.stack.imgur.com/h9hAu.png" rel="noreferrer">This</a> is my image. Unable to display it here as background is transparent and image is white in color. Please download to see it.</p>