Refactor biometric prompt credential screens - ui layer.

Step 3/3, replace existing credential views & break down code into seperate view, view model, & view binder sub-layers.

Prep for scuba.

Bug: 251476085
Test: atest AuthContainerViewTest AuthControllerTest CredentialViewModelTest
Test: manual (use test app and verify credential screens)
Change-Id: Ibcf7f30ee3f32dc736a71ae87513b9601862d20a