User story
As a Wikipedia Zero user, I want a clear indication when I enter and leave the Wikipedia Zero zone in the Wikipedia app.
Problem
Only one generic "W" icon is used to indicate when users are entering Wikipedia Zero in System notifications, so users will have to open system notifications and read the entire message each time in order to be sure when they enter/exit.
Proposed solution
Make two distinct icons to help more immediately indicate when users are exiting and entering Wikipedia Zero just from the status bar.
Mocks:
Two proposals for enter and exit.
