13/n: persist device credential across configuration changes

1) AuthContainerView can be started in either `biometric` or `credential`
   views. This is to potentially support an API where only credential
   is allowed/requested.
2) When onSaveState, AuthContainerView saves both the states of
   `biometric` and `credential` visibility. In the case of configuration
   change, AuthController is responsibile for checking the visibility
   and creating a AuthContainerView with the correct initial view.
3) When AuthCredentialView is the initial view, it owns the panel
   expansion.
4) Added landscape layout

Bug: 140127687

Test: atest com.android.systemui.biometrics
Test: BiometricPromptDemo, use pattern, rotate device. auth, cancel,
      demo logs are correct.

Change-Id: I1f501cf13b924353f251a69757fdb9d7e0bf1d21