title: AndroidStudio: flavor with a subset of assets folder
body: <p>I have an assets folder in main and three flavors. Each one of them needs to import only a subset of those files. However some of them needs to be shared.</p>
  
  <p>Let's make an example.<br>
  My assets folder in main contains four subfolders: A,B,C,D<br>
  flavor1 must contain assets A,B,C<br>
  flavor2 must contain assets A,C,D<br>
  flavor3 must contain assets B,D<br></p>
  
  <p>Is there a way to declare a subset of the main's assets folder for each flavor, avoiding to copy/paste each desired folder in every flavor assets' folder (thus avoiding replication)?</p>