Fix display of BiometricPrompt wipe warning dialogs

Ensure that both local wipe dialogs are shown by the BiometricPrompt
credential view as appropriate:
- A "last attempt" warning dialog when the user is one failure from a wipe
- The "now wiping" dialog shows before the prompt is dismissed

Test: Manual:
1. Create a work profile via TestDPC (go/testdpc)
2. Set a work profile lock pattern/PIN/password via Settings > Security
3. Launch the work profile instance of TestDPC
4. Scroll down to "Lock screen"
5. Tap "Lock screen restrictions"
6. Select the "Work profile" tab
7. Set "Max password failures for local wipe" to 3
8. Lock & unlock the screen
9. Launch work profile app
10. Enter the wrong pattern/PIN/password three times

Fixes: 152016710
Change-Id: I3771d222aaaacef5fa70c1246432a6fd1afdcd42