Promote aggregation suggestions to all contacts

If an invisible contact is selected from the aggregation
suggestion pop-up, add it to the default "all contacts"
group.

Test:
Edited an invisible contact from the aggregation popup,
saved and checked that it appeared in the main list.

Bug: 31703249
Change-Id: Ie8ee277ad6a8c3e07d5478036f109bfa1837fac3