Move biometrics enrollment v2 tests from robotests/ back to unit/
Bug: 265723532
Test: atest FingerprintRepositoryTest CredentialModelTest
AutoCredentialViewModelTest FingerprintEnrollIntroViewModelTest
FingerprintEnrollProgressViewModelTest
FingerprintEnrollmentViewModelTest
Change-Id: Id35e52a97df757f8c4473c5bf7f46ba051816d42