Subscription class / object

This should include information regarding the subscription they are subscribed to, and previous subscription information.
If they are currently at a certain subscription level, they have access to a certain page or version of a page.
If they are no longer subscribed, they cannot make new content but can access their old content(different version of a page).
If they were never subscribed they cannot make an new content in this area.

The issue names no files, tests, or entry points. Start by locating the Android code that represents subscriptions and controls access to pages or content, then document the current and previous subscription states before defining the required behavior and its tests.

Written by the indexing model from the issue text.