Do not post notifications for logged self-managed connections

When a self-managed call is missed and the self-managed
PhoneAccount has specified that they want their call logged
in the call log, do not post a notification for the missed call.
Posting the missed call notification is up to the Self-Managed
ConnectionService.

Bug: 62999358
Test: Manual, run telecom unit tests
Change-Id: Ic62ef8aaf9164d10ac4d3ffbb3e06ee5b7474d34