AltBouncer => PrimaryBouncer on strong face auth lockout

If class 3 face auth locks out on the alternate bouncer,
then show the primary bouncer since any strong biometric
lockout will lockout all other biometrics.

Test: atest AlternateBouncerViewModelTest
Test: on a device with strong fingerprint and strong
  face: enroll fingerprint; enroll face; tap on a
  notification to show the alternate bouncer;
  fail face auth until lockout on the alternate
  bouncer; observe primary bouncer shows
Fixes: 421121945
Flag: EXEMPT bugfix
Change-Id: Icc1af84f3a8cb09d821cdb186bf8e2004ccbca35