title: firebase.auth.PhoneAuthProvider missing
body: <p>I have connected my android application with firebase and enabled phone authentication on the console. However when I import</p>
  
  <pre><code>import com.google.firebase.auth.PhoneAuthProvider;
  </code></pre>
  
  <p>It can't find the class PhoneAuthProvider.
  Note that it can find other classes such as EmailAuthProvider and FirebaseAuthProvider.</p>
  
  <pre><code>compile 'com.google.firebase:firebase-auth:10.0.1'
  </code></pre>
  
  <p>is listed in the app dependencies.</p>
  
  <p>Please let me know if I need to provide any other information to get help as well.</p>