Update icons, strings and layouts for new UX design
Bug: 370940762
Test: manual:
Pre condition - no face enrolled
Go Settings>Security & privacy>Device unlock>Face unlock
Test: atest FaceEnrollTest
Flag: com.android.settings.flags.biometrics_onboarding_education
Change-Id: Ie469c47005afb941f5646a2f790736362c23c697
This gives activity embedding logic a chance to notice what taskfragment
the elements should be in, and prevents a bug where the topmost activity
can dissapear under the stack.
Test: Manual
Bug: 324018644
Change-Id: Iea8d367247b13ffe66f4558be49e8060fb7db4c5