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>

tests/auto/unit/qmultimedia_common/mockmediarecordercontrol.h

@@ -53,9 +53,12 @@ class MockMediaRecorderControl : public QMediaRecorderControl
 public:
     MockMediaRecorderControl(QObject *parent = 0):
         QMediaRecorderControl(parent),
-    m_state(QMediaRecorder::StoppedState),
-    m_position(0),
-    m_muted(false) {}
+        m_state(QMediaRecorder::StoppedState),
+        m_position(0),
+        m_muted(false),
+        m_settingAppliedCount(0)
+    {
+    }
 
     QUrl outputLocation() const
     {
@@ -83,7 +86,10 @@ public:
         return m_muted;
     }
 
-    void applySettings() {}
+    void applySettings()
+    {
+        m_settingAppliedCount++;
+    }
 
     using QMediaRecorderControl::error;
 
@@ -120,6 +126,7 @@ public:
     QMediaRecorder::State m_state;
     qint64     m_position;
     bool m_muted;
+    int m_settingAppliedCount;
 };
 
 #endif // MOCKRECORDERCONTROL_H