attrib: Update gatt_service_add size assert for dealing with 128-bit UUIDs
attrib: Update gatt_service_add size assert for dealing with 128-bit UUIDs

To paraphrase Anderson Lizardo: "h" was overflowing for 128-bit services
because the handle is incremented after each attribute is added so at
the end we had: 0xffff + 1 == 0 (h is uint16_t).

As it seems more complex to try to remove the overflow without affecting
the logic too much, we update the assertion.

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