Don't advance when recreating from bundle

The fragment is recreated from a bundle when returning from finished
activities, like the OTA and walled garden checks. Telling
WizardManager to advance to the next screen causes a duplicate
activity because WizardManager has already responded to the other
finished activity.

Bug: 15393012
Change-Id: I9817e106a0b243b3943bff6edafc228e9e002232