title: Make your app a default app to open a certain file
body: <p>How do I make my android app the default application to open a certain file type?</p>
  
  <p>I tried to clear the defaults but the option is greyed out, does anyone know how to do this?</p>
  
  <p>I want to make my app open with my <code>something.whatever</code> files in android.</p>