lib: fixed bug in Contact parser that stored old RecordIDs / UniqueIDs

lib: fixed bug in Contact parser that stored old RecordIDs / UniqueIDs

This bug caused old RecordIDs / UniqueID to be stored in the Unknowns
list, which when copied and added to the device again, would build up
and potentially cause conflicts.

In some cases, when adding a record with multiple RecordIDs, and if one of
the IDs already existed in the BlackBerry device, then the device would
get into an inconsistent state and end up with an un-deletable record,
and every attempt to edit it would give the message:

"Address updated externally. Changes will be lost and the
viewer closed"

This would also cause an inconsistency in the Record State Table record
count and the actual count retrieved during a database backup.

The only way to recover would be to restore from a known good backup,
which will erase the existing Address Book database and start fresh.