[sink] List output flags in sink proplist.
[sink] List output flags in sink proplist.

mer-hybris/pulseaudio-modules-droid,mer-hybris/pulseaudio-modules-droid,ballock/pulseaudio-modules-droid,ballock/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid