[rilmodem] Set the path for all ADN record readings

Core does not list EFpbr to it's EF list so we cannot trust
sim_ef_db_get_path_3g or sim_ef_db_get_path_2g to find the
correct path. In order to read the 2nd and later phonebook
records we have to define the path in rilmodem level.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
Merge pull request #189 from jkangas/next

Request for pulling usage of preset paths when reading ADN records to next branch