The combined biometrics settings has been integrating face and
fingerprint authentication together, so the confirming credential flow
has to be invoked before entering biometrics settings page.
Bug: 183449119
Test: manual
Change-Id: I3c0d059241cb10a254868c2e388c4d3b20305b10
There will be multiple biometrics authentications existing at the same
time, so we added a new page for multiple biometrics to control
biometrics settings.
Bug: 183449119
Test: manual test
Change-Id: I359082caf771e07dfd5b24973cb8a3cf372c1b30