This change implements parsing of EF.MSISDN (and thus EF.ADN)
as per 3GPP TS 31.102, sections 4.2.26 and 4.4.2.3.
Example (commercial SIM card from 401/02):
EF.MSISDN: ffffffffffffffffffffffffffff07917787028982f7ffffffffffff
Decoded (NPI=1 ToN=1): +77782098287
Note that sysmoUSIM-SJS1 in the test setup has malformed
EF.MSISDN, so that's why the test output is changed.
Change-Id: Ie914ae83d787e3f1a90f9f305bffd45053b8c863