Fix call log and contact lookup

Call log lookup was broken by InCallApi introduction.
Contact custom number labels weren't synced to dialer database, causing
the label to be shown as "custom" instead of the correct string during T9
dialpad search.

Use InCallApi plugin name as label if available, becauase some
plugins use the label column for strings that are too long to be
considered a label.

Ticket CD-460
Change-Id: I38bbbdbee23598e5d6ca6347ed77ae9c318a1c6b