title: Floating button change attribute app:maxImageSize frome code
body: <p>I need to adjust icon size (increase) to floatingButton size which I change in code. 
  In xml I can use attribute app:maxImageSize  from here <a href="https://stackoverflow.com/questions/27484126/adjust-icon-size-of-floating-action-button-fab">adjust-icon-size-of-floating-action-button</a></p>
  
  <p>But I need to change FAB size in code so I need to change this attribute in code as well. But I did't manage to find suitable method fo FAB </p>
  
  <p>Is there a way to set maxImageSize from code/adjust icon?</p>