incremental upgrades: do not try to update media unless created using the Tails USB installer
Originally created by Tails on #5321 (Redmine)
Should not try to update a Tails that was not created using Tails USB installer
Tails::Persistence::Setup
has code to check if the system was created
using the Tails USB installer (device_has_tails
). It should not be too
hard to reuse it.
Parent Task: #5922 (closed)