title: Firebase Analytics does not work in my app
body: <p>I migrated my GCM project to Firebase, until then, everything is working correctly, but the analytics today showed nothing, does not work.</p>
  <p>I deleted my old package that was <code>com.mypackage.gcm</code> to <code>com.mypackage</code> in the Firebase console and I don't know if that was the problem.</p>
  <p>Any help is appreciated.</p>