Document the 'restricted network access' default when running Kolibri as an app

[rtibbles]

When someone installs the Kolibri app, even if they previously had an older version of the app installed, then it will activate the 'restrict network access' default.

We should document this, and also document that they can toggle this off if desired in the device settings.

[Spoorthy1423]

Hey!! I would like to work on this issue @rtibbles please assign me this issue!!

[radinamatic]

@Spoorthy1423 Thank you for your interest in contributing to Kolibri!

This is a user documentation writing issue, not a coding one 🙂
In case you are interested in contributing code, please read these guidelines first.