Don't log privapp-permissions violations for updated apps

Only warn about violations in non-updated apps. If an updated privileged
app started requesting a new privileged permission, it cannot be
whitelisted on system image, so we should revoke it as before, but not log.

Test: manual
Bug: 35633526
Change-Id: I6aacaed4be7bf6eaef08ea81ea49cd250c81e71e