Add VIA number column to CallLog Database

Add a column to the CallLog Database that records the secondary line
number that an incoming call has been received on. More specifically, a
call is assumed to be considered a "VIA number" if the call's incoming
line number does not match the number registered with the SIM card.

BUG: 25594198
Change-Id: Idc7ea7b3539c859031a6911ec6b211fd2d8dd085