Have stopService check service state before attempting to control it.

Control returns an error if the service is already stopped, so this avoids an error in situations where the stop is effectively already accomplished.

PiperOrigin-RevId: 437807711

go/helpers/helpers_windows.go

@@ -324,7 +324,15 @@ func StartService(name string) error {
 }
 
 func stopService(s *mgr.Service) error {
-	stat, err := s.Control(svc.Stop)
+	// although s.Control returns stat, if the service is already stopped it returns an error
+	stat, err := s.Query()
+	if err != nil {
+		return err
+	}
+	if stat.State == svc.Stopped {
+		return nil
+	}
+	stat, err = s.Control(svc.Stop)
 	if err != nil {
 		return err
 	}