Use localized name for guest user

Rather than use the stored name, which depends on the language
in use when the Guest was created, always try to use the localized
word for Guest.

Bug: 22205776
Change-Id: I1a4912b9561196eee811eae31c8df2b72413648f

src/com/android/settings/Utils.java

@@ -923,11 +923,13 @@ public final class Utils {
      * Returns a label for the user, in the form of "User: user name" or "Work profile".
      */
     public static String getUserLabel(Context context, UserInfo info) {
+        String name = info != null ? info.name : null;
         if (info.isManagedProfile()) {
             // We use predefined values for managed profiles
             return context.getString(R.string.managed_user_title);
+        } else if (info.isGuest()) {
+            name = context.getString(R.string.user_guest);
         }
-        String name = info != null ? info.name : null;
         if (name == null && info != null) {
             name = Integer.toString(info.id);
         } else if (info == null) {