Update remove face enrollment strings for convenience.

Fix: 209877102
Test: manual (enroll & delete)
Change-Id: Idb3a8d3622574edc47673e8fe6a72a5b9d449c7b

src/com/android/settings/biometrics/BiometricUtils.java

@@ -22,6 +22,9 @@ import android.app.admin.DevicePolicyManager;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentSender;
+import android.hardware.biometrics.SensorProperties;
+import android.hardware.face.FaceManager;
+import android.hardware.face.FaceSensorPropertiesInternal;
 import android.os.storage.StorageManager;
 import android.util.Log;
 import android.view.Surface;
@@ -273,4 +276,17 @@ public class BiometricUtils {
     public static boolean isReverseLandscape(@NonNull Context context) {
         return context.getDisplay().getRotation() == Surface.ROTATION_270;
     }
+
+    /**
+     * @param faceManager
+     * @return True if at least one sensor is set as a convenience.
+     */
+    public static boolean isConvenience(@NonNull FaceManager faceManager) {
+        for (FaceSensorPropertiesInternal props : faceManager.getSensorPropertiesInternal()) {
+            if (props.sensorStrength == SensorProperties.STRENGTH_CONVENIENCE) {
+                return true;
+            }
+        }
+        return false;
+    }
 }