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/mediacapture/qgstreameraudioencode.cpp

@@ -48,7 +48,7 @@
 #include <math.h>
 
 QGstreamerAudioEncode::QGstreamerAudioEncode(QObject *parent)
-    :QAudioEncoderControl(parent)
+    :QAudioEncoderSettingsControl(parent)
 {
     QList<QByteArray> codecCandidates;