IMS: Add support to display IMS related call logs.

1) Add config to enable/disable IMS call log.
2) Add IMS call type in call log activities.
3) Show "4G voice call" in call log details for VoLTE calls.

Change-Id: I5bc5f3651b27ed6a64d081188e45af492c72aa61
CRs-Fixed: 938465