bluez/ubt: Fix Map profile test

MAP profile test was using a deprecated API dating back from 2012.
Update it according to version of bluez present in Apertis.

Reviewed-by: Philip Withnall <philip.withnall@collabora.co.uk>
Signed-off-by: Frédéric Dalleau <frederic.dalleau@collabora.com>
Differential Revision: https://phabricator.apertis.org/D4906