title: React Native PixelRatio.get() returns a value outside the provided "buckets" for Nexus 5x
body: <p>Based on the React Native documentation, <code>PixelRatio.get()</code> should return one of the following values for the device pixel density:</p>
  
  <pre><code>- PixelRatio.get() === 1
    mdpi Android devices (160 dpi)
  - PixelRatio.get() === 1.5
    hdpi Android devices (240 dpi)
  - PixelRatio.get() === 2
    iPhone 4, 4S
    iPhone 5, 5c, 5s
    iPhone 6
    xhdpi Android devices (320 dpi)
  - PixelRatio.get() === 3
    iPhone 6 plus
    xxhdpi Android devices (480 dpi)
  - PixelRatio.get() === 3.5
    Nexus 6
  </code></pre>
  
  <p>When calling <code>PixelRatio.get()</code> on a Nexus 5x I get the density value <code>2.625</code>. Is the expected? Are we supposed to manually manage the values that are between the basic ones or is this a bug inside React Native?</p>
  
  <p>FYI, I'm using RN v0.24</p>