Comment 6 for bug 1457531

@jhodapp

On ubuntu Ubuntu 20.04.1 LTS:

given spotify installed from snap
with playerctl installed from apt
with a BOSE QC35 II connected and active
when I play music on spotify
and I shut down the headset,
spotify does not pause the music

Corresponding journalctl traces:
```
janv. 19 12:11:41 x1byjean acpid[1487]: input device has been disconnected, fd 21
janv. 19 12:11:41 x1byjean /usr/lib/gdm3/gdm-x-session[5171]: (II) config/udev: removing device LE-Grotte 35ii (AVRCP)
janv. 19 12:11:41 x1byjean /usr/lib/gdm3/gdm-x-session[5171]: (**) Option "fd" "76"
janv. 19 12:11:41 x1byjean /usr/lib/gdm3/gdm-x-session[5171]: (II) event20 - LE-Grotte 35ii (AVRCP): device removed
janv. 19 12:11:41 x1byjean /usr/lib/gdm3/gdm-x-session[5171]: (II) UnloadModule: "libinput"
janv. 19 12:11:41 x1byjean /usr/lib/gdm3/gdm-x-session[5171]: (II) systemd-logind: releasing fd for 13:84
janv. 19 12:11:41 x1byjean gsd-media-keys[5530]: Unable to get default sink
janv. 19 12:11:41 x1byjean dbus-daemon[1494]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.94" (uid=1000 pid=5078 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.4" (uid=0 pid=1491 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
janv. 19 12:11:41 x1byjean audit[1494]: USER_AVC pid=1494 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="CheckPermissions" name=":1.11" mask="receive" pid=15782 label="snap.spotify.spotify" peer_pid=1495 peer_label="unconfined"
                                         exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
janv. 19 12:11:41 x1byjean kernel: audit: type=1107 audit(1611054701.189:230): pid=1494 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="CheckPermissions" name=":1.11" mask="receive" pid=15782 label="snap.spotify.spotify" peer_pid=1495 peer_label="unconfined"
                                    exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
```