streamrestore: workaround for notification volume
kcm: adjust to changes in VolumeSlider
Adjust StreamListItem to changes in fec28d12.
Previously cannot interact with slider for playback streams.
streamrestore: workaround for notification volume
stream_restore_subscribe has not been implemented on pipewire yet. Since streamrestore relies on the call back to update the volume slider and mute button status, users are unable to interact with those. This workaround uses the cached values instead.
Edited by Yifan Zhu