Add todo comment

Author: sfodagain

src/test/java/software/amazon/awssdk/crt/test/ServerListenerTest.java

@@ -114,6 +114,7 @@ public void onConnectionShutdown(ServerConnection serverConnection, int errorCod
             }
         });
         } catch (CrtRuntimeException ex) {
+            // TODO This doesn't happen for nw sockets.
             exceptionThrown = true;
         }
         assertTrue(exceptionThrown);