title: getQuantityString returns wrong string with 0 value
body: <p>In an android app, I have the following string resources:</p>
  
  <pre><code>&lt;plurals name="test"&gt;
     &lt;item quantity="zero"&gt;"I have 0 item"&lt;/item&gt;
     &lt;item quantity="one"&gt;"I have 1 item"&lt;/item&gt;
     &lt;item quantity="other"&gt;"I have several items"&lt;/item&gt;
  &lt;/plurals&gt;
  </code></pre>
  
  <p>And the following line of code:</p>
  
  <pre><code>String text = getResources().getQuantityString(R.plurals.test, 0)
  </code></pre>
  
  <p>which I would expect to return</p>
  
  <blockquote>
    <p>I have 0 item</p>
  </blockquote>
  
  <p>But it actually returns</p>
  
  <blockquote>
    <p>I have 1 item</p>
  </blockquote>
  
  <p>Why ?</p>