Small performance improvement for `PlayerDomain#contains()` (#1765)

* Improve performance by putting UUID checks first.

* Added wizjany's suggestion

Co-authored-by: wizjany <wizjany@gmail.com>

worldguard-core/src/main/java/com/sk89q/worldguard/domains/PlayerDomain.java

@@ -149,7 +149,7 @@ public class PlayerDomain implements Domain, ChangeTracked {
     @Override
     public boolean contains(LocalPlayer player) {
         checkNotNull(player);
-        return contains(player.getName().trim().toLowerCase()) || contains(player.getUniqueId());
+        return contains(player.getUniqueId()) || (!names.isEmpty() && contains(player.getName()));
     }
 
     /**