title: Launcher Icon is not Shown in Oreo 8.0/8.1
body: <blockquote>
    <p><strong>Explanation:</strong></p>
    
    <p>I have a working app in google play market. Everything works fine in
    android versions from 4.0-7.0.</p>
    
    <p><strong>Case:</strong></p>
    
    <p>When the client downloaded it on his Android 8.0 (Oreo) a launcher
    icon did not seem to show instead android's default launcher icon is
    showing!!</p>
    
    <p><strong>Question:</strong></p>
    
    <p>Anyone who has encountered such issue? I need any hints to solve it since it seems weird because I have all 4 typed .png icons in mipmap folder.</p>
  </blockquote>