title: "This app is not authorized to use Firebase Authentication" in Emulator
body: <p>I'm getting this error when I try to run my app on emulator. </p>
  
  <p>What I've done: </p>
  
  <ol>
  <li>I'm using Firebase-UI and running Android O </li>
  <li>I have the Play Store updated. </li>
  <li>I've added all the SHA-1 code to Firebase console and the package name matches.</li>
  </ol>
  
  <p>In fact when I run the app on a real device it runs perfectly and I can login. </p>
  
  <pre><code>This app is not authorized to use Firebase Authentication. Please verify that the correct package name and SHA-1 are configured in the Firebase Console.
   com.google.firebase.auth.FirebaseAuthException: This app is not authorized to use Firebase Authentication. Please verifythat the correct package name and SHA-1 are configured in the Firebase Console. [ App validation failed. Is app running on a physical device? ]
   at com.google.android.gms.internal.jz.zzK(Unknown Source:239)
   at com.google.android.gms.internal.kp.zza(Unknown Source:2)
   at com.google.android.gms.internal.kq.run(Unknown Source:37)
   at android.os.Handler.handleCallback(Handler.java:789)
   at android.os.Handler.dispatchMessage(Handler.java:98)
   at android.os.Looper.loop(Looper.java:164)
   at android.app.ActivityThread.main(ActivityThread.java:6541)
   at java.lang.reflect.Method.invoke(Native Method)
   at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  </code></pre>