Trust: Actually cancel notification if the setting is disabled

* When onboarding, the notifications show up properly
* Once you disable any of the notifications, none of them vanishes
  due to the logic being inverted:
  We want to cancel the notification if the warning is not allowed!

Change-Id: Id3f3b3c9e184cc11d2909dd1e0f7859e32588728
(cherry picked from commit eec59ae1)