Don't update Configuration#locale on MCC/carrier changes.

Also, handle the sim language indicator (EF LI) and the sim
preferred language (EF PL). We keep track of these values in
the IccRecords object and make the information available via
the associated "Phone" object.

This means language updates are always consistent, the last
SIM to load records doesn't always "win".

bug: 19818550

Change-Id: I719eb75cbf48f54167b596c677f883a2ffb99ff7