Do not show work profile strings for parent-managed enrollment

Work profiles and parental management both utilize the
DevicePolicyManager KEYGUARD_DISABLE_* flags. This CL ensures that
work profile strings are only shown for work profiles, and not
parent-managed devices.

Bug: 196060286
Bug: 196443744
Test: Set up child account, then enroll from Settings > Security
Change-Id: Ib5ed1d63dd5d58ac64caf30010e340ac7784c38f

src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java

@@ -19,6 +19,7 @@ package com.android.settings.biometrics.face;
 import android.app.admin.DevicePolicyManager;
 import android.app.settings.SettingsEnums;
 import android.content.Intent;
+import android.hardware.biometrics.BiometricAuthenticator;
 import android.hardware.face.FaceManager;
 import android.hardware.face.FaceSensorPropertiesInternal;
 import android.os.Bundle;
@@ -287,6 +288,11 @@ public class FaceEnrollIntroduction extends BiometricEnrollIntroduction {
         // TODO(b/110906762)
     }
 
+    @Override
+    public @BiometricAuthenticator.Modality int getModality() {
+        return BiometricAuthenticator.TYPE_FACE;
+    }
+
     @Override
     @NonNull
     protected FooterButton getPrimaryFooterButton() {