Pocketables guys discovered Google new VPN service called “Google Connectivity Services.” running on Android 5.1 in background of the on Google Nexus 6 by Motorola. To find this app, just navigate to Settings > Apps > All, scroll down, and there it is:
While the service does not appear to be live or available for use, it seems that Google may soon allow Android users to connect to a VPN while on open public WiFi networks.
This new Google hidden vpn service might be there for Google new wireless network coming in the US. but as now this service does not work. On the other hand, Google may never offer this to the public, and instead, Google VPN is just a setting for Googlers to use while they are out and about.