In windows, discovery phase and outgoing attempt won't be recorded due to pointer is reset to null.

PiperOrigin-RevId: 728907296

connections/implementation/base_pcp_handler.cc

@@ -883,6 +883,9 @@ Status BasePcpHandler::RequestConnection(
                "to endpoint_id="
             << endpoint_id;
 
+        client->OnRequestConnection(GetStrategy(), endpoint_id,
+                                    connection_options);
+
         ConnectionInfo connection_info =
             FillConnectionInfo(client, info, connection_options);