Don't attribute incorrect unified challenge attempt to profile.

If the profile uses unified challenge and we attempt to check its
password instead of parent user's password (as would be the case in
the UI), we shouldn't try report this attempt sinse the user doesn't
have a real password of its own and SecurityException will be thrown
from DPMS.reportFailedPasswordAttempt.

Test: adb shell cmd lock_settings verify --user 10 --old 12368
Bug: 63295016
Change-Id: Ieb60a064a79095be9fde12cbd6ffca8076d769c3