Draft: Add apparmor rules & Split pipewire-media-session from pipewire-bin package

Add AppArmor rules for PipeWire.
Move pipewire-media-session to its own package to allow to replace it by another one like wireplumber.
Move pipewire-pulse to its own package, this allows to install and start PulseAudio daemon replacement explicitly.

Signed-off-by: Frédéric Danis frederic.danis@collabora.com