Messaging: Don't show numbers of contacts multiple times

* Somehow there are multiple entries per some numbers, sometimes stored
  with, sometimes without spaces and/or invisible characters
* This leads to the same number being shown multiple times
* Don't add those entries by comparing number and type of all
  already added entries with the staging one

Change-Id: Ic815393d3d4f4ba56107f42c9d8940309564554c
2 files changed