Contacts: Join the current contact with the selected contact

Aggregation exceptions in database are not updated completely
when the user try to join the current contact with the selected
contact.

When join the current contact with the selected contact, we should
update all the aggregation exceptions for each pair of raw contacts.

CRs-Fixed: 542577

Change-Id: If5388bc2a5c3b63b54286084e228be47e1c2bcd3
Merge "Contacts: Join the current contact with the selected contact" into jb-mr2