[Issue 2165144] Fixing managed delete dialogs in ContactListActivity

Since these dialogs are managed, they are not actually destroyed after the first
use, but reused.  These dialogs were initialized with the URI of the first
contact we were deleting.  On subsequent calls, they were reused and tried to
delete the same contact.

Change-Id: I517b266a96fe72268c8dfbc7fe3f84fa366d7a23