When user clicks "OK" in FingerprintEnrollEnrollingIconTouchDialog,
continue enrolling.
Bug: 276416053
Test: atest FingerprintEnrollEnrollingViewModelTest
FingerprintEnrollmentActivityTest
Test: Manually check enrolling status as clicking "OK" button on
FingerprintEnrollEnrollingIconTouchDialog after enabling
biometrics v2 v2 through feature flag.
Change-Id: I028723acfe35e5119e43b6860022c7432fc2ae0e