title: What are the ProGuard rules for Firebase?
body: <p>What are the ProGuard rules for these dependencies?</p>
  
  <pre><code>compile 'com.google.firebase:firebase-core:10.0.1'
  compile 'com.google.firebase:firebase-crash:10.0.1'
  compile 'com.google.firebase:firebase-messaging:10.0.1'
  compile 'com.google.firebase:firebase-ads:10.0.1'
  </code></pre>