title: How to handle shouldInterceptRequest parameter change in API21?
body: <p>In API21 Google modified shouldInterceptRequest method to use <code>WebResourceRequest request</code> instead of <code>String url</code>. 
  Is there any way I could write a generic class extending <code>WebViewClient</code> and handle both methods? 
  My minimum API version is 18.</p>
  
  <p>Thanks
  Krystian</p>