Fill in serial field for all HID controllers using hidapi

Controllers/LogitechController/RGBController_LogitechG502PS.cpp

@@ -18,6 +18,7 @@ RGBController_LogitechG502PS::RGBController_LogitechG502PS(LogitechG502PSControl
     type                            = DEVICE_TYPE_MOUSE;
     description                     = "Logitech Mouse Device";
     location                        = logitech->GetDeviceLocation();
+    serial                          = logitech->GetSerialString();
 
     mode Static;
     Static.name                     = "Static";