title: Default value on Bundle.getString(String key)
body: <p>I've just noticed that, while most of getters from a <code>Bundle</code> have the possibiliy of including a default value, in case the key doesn't exist in that particular bundle instance, <code>getString</code> does not have that possibility, returning null if that case.</p>
  
  <p>Any ideas on why is that and if there is some way of easy solution to that (by easy I mean not having to check each individual value or extending the <code>Bundle</code> class).</p>
  
  <p>As an example, right now you have only this:</p>
  
  <pre><code>bundle.getString("ITEM_TITLE");
  </code></pre>
  
  <p>While I would like to do:</p>
  
  <pre><code>bundle.getString("ITEM_TITLE","Unknown Title");
  </code></pre>
  
  <p>Thanks!</p>