[Biometric Onboarding & Edu] Support ways to use section for Face & FP

Move "Ways to use" section from "Face & Fingerprint Unlock" page to
"Face unlock" & "Fingerprint unlock" pages which means Face &
Fingerprint settings now have their own "Unlock your phone" & "Verify
it's your in app" settings.

Bug: 370940762
Test: atest FaceSettingsAppsPreferenceControllerTest
            FaceSettingsKeyguardUnlockPreferenceControllerTest
	    FingerprintSettingsAppsPreferenceControllerTest
	    FingerprintSettingsKeyguardUnlockPreferenceControllerTest
	    FingerprintSettingsFragmentTest
Flag: com.android.settings.flags.biometrics_onboarding_education
Change-Id: I702da9bb9415b6deb741132ccde6b8be7ae38de0