Launch FaceEnrollPage form BiometricEnrollActivity

For compatible with Biometric V2, launch FaceEnrollPage from
BiometricEnrollActivity

Bug: 259658609
Test: 1. adb root
      2. adb shell am start -n com.google.android.setupwizard/.SetupWizardTestActivity
      3. Test Fingerprint & Face enrollment
Change-Id: Ice85406abaa3d7a4b686fb017349471118a42951