Added QMediaRecorder::actualLocation property

To report the actual location file was written.

Change-Id: Ibb56a720a258a1e5cedceaf0f9bcea73fb93bc96
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

tests/auto/unit/qmultimedia_common/mockmediarecordercontrol.h

@@ -100,6 +100,9 @@ public slots:
         m_position=1;
         emit stateChanged(m_state);
         emit durationChanged(m_position);
+
+        QUrl actualLocation = m_sink.isEmpty() ? QUrl::fromLocalFile("default_name.mp4") : m_sink;
+        emit actualLocationChanged(actualLocation);
     }
 
     void pause()