phonon: Add support for PulseAudio stream moves.
phonon: Add support for PulseAudio stream moves.

This allows us to use the new capabilities in PulseSupport to move the streams.
The only bit I'm not sure about in this commit is the change of k_ptr -> d in the final
hunk. Hopefully someone can confirm it's safe.

KDE/phonon-waveout,shadeslayer/phonon-gstreamer,KDE/phonon-xine,KDE/phonon-xine,KDE/phonon-mmf,KDE/phonon-gstreamer,KDE/phonon-gstreamer,shadeslayer/phonon-gstreamer,KDE/phonon-quicktime,KDE/phonon-directshow,KDE/phonon-xine,shadeslayer/phonon-gstreamer,KDE/phonon-directshow