AVCTP: Fix allways destroying browsing channel
AVCTP: Fix allways destroying browsing channel

This reverts commit 53d3fc3fad5152167458625ad2acf19070cdf26a that leads
to always destroy the browsing channel because the callback changes the
state.

To fix session_browsing_cb naw takes care of destroying the channel if it
disconnects.

mapfau/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,ComputeCycles/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,pkarasev3/bluez,silent-snowman/bluez,pkarasev3/bluez,silent-snowman/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez