title: Firebase cloud messaging(FCM) not working on android version below kitkat (4.4)
body: <p>I have implemented FCM as per documentation and it is working perfectly on android versions 4.4(Kitkat) and above and not working on 4.3(Jelly Bean) and below versions. As per FCM documentation it says the minimum version required is 4.0 with play services which I have. FCM is generating refresh token and when I use it to send message from my server or FCM console it is not working. Below is my Manifest entries for FCM.</p>
  
  <p><a href="https://firebase.google.com/docs/cloud-messaging/android/client" rel="nofollow noreferrer">Firebase documentation</a></p>
  
  <pre><code>     &lt;service android:name=".service.RMFirebaseInstanceIDService"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.google.firebase.INSTANCE_ID_EVENT" /&gt;
          &lt;/intent-filter&gt;
      &lt;/service&gt;
      &lt;service android:name=".service.RMFirebaseMessagingService"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="com.google.firebase.MESSAGING_EVENT" /&gt;
          &lt;/intent-filter&gt;
      &lt;/service&gt;
  </code></pre>
  
  <p>Any suggestion is appreciated. Thanks. </p>