Add mandatory biometric prompt to platform surfaces (1/N)

1. Face settings
2. Fingerprint settings
3. Change device credential

Flag: android.hardware.biometrics.Flags.MANDATORY_BIOMETRICS
Bug: 339910718
Test: atest UtilsTest

Change-Id: I69778d1733ea9fb312e7c26ae0fa23b6008dde5d

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

@@ -160,11 +160,13 @@ public class ChooseLockGeneric extends SettingsActivity {
         static final int CHOOSE_LOCK_BEFORE_BIOMETRIC_REQUEST = 103;
         @VisibleForTesting
         static final int SKIP_FINGERPRINT_REQUEST = 104;
+        private static final int BIOMETRIC_AUTH_REQUEST = 105;
 
         private LockPatternUtils mLockPatternUtils;
         private DevicePolicyManager mDpm;
         private boolean mRequestGatekeeperPasswordHandle = false;
         private boolean mPasswordConfirmed = false;
+        private boolean mBiometricsAuthSuccessful = false;
         private boolean mWaitingForConfirmation = false;
         private boolean mWaitingForActivityResult = false;
         private LockscreenCredential mUserPassword;
@@ -488,6 +490,17 @@ public class ChooseLockGeneric extends SettingsActivity {
                     ? data.getParcelableExtra(ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD)
                     : null;
                 updatePreferencesOrFinish(false /* isRecreatingActivity */);
+                if (Utils.requestBiometricAuthenticationForMandatoryBiometrics(getContext(),
+                        mBiometricsAuthSuccessful, mWaitingForConfirmation)) {
+                    mWaitingForConfirmation = true;
+                    Utils.launchBiometricPromptForMandatoryBiometrics(this, BIOMETRIC_AUTH_REQUEST);
+                }
+            } else if (requestCode == BIOMETRIC_AUTH_REQUEST) {
+                if (resultCode == Activity.RESULT_OK) {
+                    mBiometricsAuthSuccessful = true;
+                } else {
+                    finish();
+                }
             } else if (requestCode == CHOOSE_LOCK_REQUEST) {
                 if (resultCode != RESULT_CANCELED) {
                     getActivity().setResult(resultCode, data);