When NowPlaying.AdminOnly is enabled, non-admin users now receive an empty
list from the Subsonic getNowPlaying endpoint, mirroring how Jukebox.AdminOnly
is enforced server-side. Previously this restriction was only applied in the
web UI and could be bypassed by calling the endpoint directly.
The endpoint otherwise keeps the standard Subsonic behavior of returning what
all users are currently playing, without filtering by the requesting user's
library access.
Signed-off-by: Deluan <deluan@navidrome.org>
4298cec37d