Rename a few controls.

The encoder controls could be confused with actual encoding, so make
clear they are just settings.  Also, the end point selector controls
were not named very well.

Change-Id: I27f8bf9c865c5f295abad97c01ef98752af42613
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Ling Hu <ling.hu@nokia.com>

src/plugins/gstreamer/camerabin/camerabinaudioencoder.cpp

@@ -46,7 +46,7 @@
 #include <QtCore/qdebug.h>
 
 CameraBinAudioEncoder::CameraBinAudioEncoder(QObject *parent)
-    :QAudioEncoderControl(parent),
+    :QAudioEncoderSettingsControl(parent),
      m_codecs(QGstCodecsInfo::AudioEncoder)
 {
 }