Add utility methods used by the call stats code

Change-Id: If000c0638af8b50654f2a3637e9a780759710502
ContactsCommon: Add direct call from contact list feature. (1/2)

  - Requires cmcc overlay flag to be set in Contacts.

Change-Id: I6f957029a26f3e01825cb57b7b0620f618d1eb69