Samsung has started pushing out the the latest April Security Update to it’s Galaxy J7 (2016) units. The update comes with build number: J710FXXU3AQD4 and weighs around 26MB in size.
Aside from this we don’t know (if any) other changes the update has brought. Currently Indian units are rolling out with this latest android security update.
As usual it’s an OTA update so will take time to reach every unit so be patient.