3/n: Make CDCA transparent and add BiometricPrompt

ConfirmDeviceCredentials now uses BiometricPrompt instead of
FingerprintManager

Bug: 111461540

Test: FRP does not display BiometricPrompt (as expected)
      adb shell settings put global device_provisioned 0 && adb shell am start -a android.app.action.CONFIRM_FRP_CREDENTIAL
Test: Using KeyguardManager API to launch, all corner cases seem OK
Test: Tested with work profile + one lock enabled/disabled, seems OK
Test: Enroll normal FP but not work FP, BiometricPromptDemo for both works
      OK
Test: Test CC on work version of BPD, then BP on normal version of BPD,
      both accept correct FP's (no regression from P)

Change-Id: Iacdaf76ab76971850212dc79513bfa3f4b89eb9a

src/com/android/settings/password/ConfirmDeviceCredentialBaseActivity.java

@@ -140,6 +140,15 @@ public abstract class ConfirmDeviceCredentialBaseActivity extends SettingsActivi
         }
     }
 
+    @Override
+    public void finish() {
+        super.finish();
+        if (getIntent().getBooleanExtra(
+                ConfirmDeviceCredentialBaseFragment.USE_FADE_ANIMATION, false)) {
+            overridePendingTransition(0, R.anim.confirm_credential_biometric_transition_exit);
+        }
+    }
+
     public void prepareEnterAnimation() {
         getFragment().prepareEnterAnimation();
     }