Replaced QMediaRecorderControl::play/stop/pause with setState

This allows to introduce new states without breaking BC.

Change-Id: I03c064cec92d6745b251a51cfb301e7f01f4b765
Reviewed-by: Ling Hu <ling.hu@nokia.com>

tests/auto/unit/qmultimedia_common/mockmediarecordercontrol.h

@@ -130,6 +130,22 @@ public slots:
         emit statusChanged(m_status);
     }
 
+    void setState(QMediaRecorder::State state)
+    {
+        switch (state) {
+        case QMediaRecorder::StoppedState:
+            stop();
+            break;
+        case QMediaRecorder::PausedState:
+            pause();
+            break;
+        case QMediaRecorder::RecordingState:
+            record();
+            break;
+        }
+    }
+
+
     void setMuted(bool muted)
     {
         if (m_muted != muted)