scan: Write parameters when requested
scan: Write parameters when requested

This patch implements the update procedure of the scan parameters
when the Scan Server requests. The Scan Refresh characteristic is
used to inform the Scan Client(BlueZ) that the Scan Server requires
the most recent scan settings.

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