Updated the camerabin2 based camera with QtMultimedia changes

Moved it to the separate plugin as the rest of gstreamer based services;
Updated with libqgsttools_p changes;
Implemented QMediaRecorder::status property;
Made gst_photography dependency optional,
it's not always available on desktop;
Added video recording case to auto integration test;
Moved backend implementation into qt namespace

Task-number: QTBUG-26046
Change-Id: Iacfc1a6e263a4c0201d5eb28d04c960b87a230c0
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/plugins/gstreamer/camerabin/camerabinvideoencoder.h

@@ -43,7 +43,6 @@
 #define CAMERABINVIDEOENCODE_H
 
 #include <qvideoencodersettingscontrol.h>
-class CameraBinSession;
 
 #include <QtCore/qstringlist.h>
 #include <QtCore/qmap.h>
@@ -52,9 +51,11 @@ class CameraBinSession;
 #include <gst/gst.h>
 #include <gst/pbutils/pbutils.h>
 #include <gst/pbutils/encoding-profile.h>
-#include "qgstcodecsinfo.h"
+#include <private/qgstcodecsinfo_p.h>
 
-QT_USE_NAMESPACE
+QT_BEGIN_NAMESPACE
+
+class CameraBinSession;
 
 class CameraBinVideoEncoder : public QVideoEncoderSettingsControl
 {
@@ -94,4 +95,6 @@ private:
     QVideoEncoderSettings m_userSettings;
 };
 
+QT_END_NAMESPACE
+
 #endif