title: Notify UI from OkHttp Interceptor
body: <p>I need to change UI based on boolean value in interceptor (i get to know it only inside interceptor and it never leaves it). </p>
  
  <p><strong>Possible solution I though of:</strong><br>
  Create handler like <code>new Handler(Looper.getMainLooper())</code> and then do <code>.post(new Runnable()..)</code>, but I don't want to mess UI logic into Interceptor class.</p>