title: How to integrate GCM in android.mk project
body: <p>I would like to integrate GCM(Google Cloud Message) in android.mk projects. I know we have a latest version of FCM. Still I have to use GCM due to server side implementation. I am able to achieve GCM using build.gradle(Android Studio) same thing to I have to port in android.mk project. </p>
  
  <p>I have added all google-play-services(.aar files) in libs folder and we are able to build the project. Using GCM token we are trying to send the notifications. We unable to receive the notifications. Same code is working fine in build.gradle(android studio).</p>
  
  <p>Please let me know how to solve this problem.</p>