title: Package id platform: android-O not available
body: <p>While trying to clone <a href="https://developer.android.com/preview/overview.html" rel="noreferrer">Android O</a> sample from github, project can't able to sync and give below error.
  Android studio give <em>package unavailable</em>, which can't able to install missing platform (android o).</p>
  
  <p><a href="https://i.stack.imgur.com/cTtoh.png" rel="noreferrer"><img src="https://i.stack.imgur.com/cTtoh.png" alt="Android O missing package"></a></p>
  
  <p>I am using android studio 2.3 and cloning android o example: <a href="https://developer.android.com/preview/o-samples.html#nc" rel="noreferrer">https://developer.android.com/preview/o-samples.html#nc</a></p>
  
  <p>Can any one suggest, how can I able to run cloned example?</p>