Split QMediaRecorder::setEncodingSettings to separate setters.

It's easier to change only the necessary part of encoding settings.
The settings are applied during the next event loop or before recording
starts.

Change-Id: Ia2b5c93826a302212aa7f79a0c75e4cbaaf1dd7a
Reviewed-by: Ling Hu <ling.hu@nokia.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/imports/multimedia/qdeclarativecamerarecorder_p.h

@@ -144,8 +144,6 @@ private:
     friend class QDeclarativeCamera;
     QDeclarativeCameraRecorder(QCamera *camera, QObject *parent = 0);
 
-    void applySettings();
-
     QMediaRecorder *m_recorder;
 
     QAudioEncoderSettings m_audioSettings;