core: device: Fix connect bearer selection
core: device: Fix connect bearer selection

For dual-mode devices created from storage, trying to connect without
a scan sometimes causes the incorrect bearer to be connected. This
patch modifies device.c:select_conn_bearer so that it simply returns the
stored bdaddr_type of a device if neither bredr nor le have been seen
in a while.

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