Only use GCM if IS_GCM_ENABLED is true in the google plist (#1821)
Only use GCM if IS_GCM_ENABLED is true in the google plist (#1821)


phonegap/phonegap-plugin-push,phonegap/phonegap-plugin-push,jaraxasoftware/phonegap-plugin-push,jaraxasoftware/phonegap-plugin-push,intercom/phonegap-plugin-push,shazron/phonegap-plugin-push,jaraxasoftware/phonegap-plugin-push,shazron/phonegap-plugin-push,shazron/phonegap-plugin-push,phonegap/phonegap-plugin-push,intercom/phonegap-plugin-push,intercom/phonegap-plugin-push