Various call log / call details video call changes.

Requires cl/501841.

Call log:
1. Add video call affordance.
2. Add accessibility text for calls, video call afforance.
3. Fixed unit test

Call details:
1. Showing video icon when a call had video.
2. Changing call headings to indicate they were video calls.

Bug: 16013879
Bug: 16013344
Bug: 16013684
Change-Id: I53b5bf9b0b1a63f9d119318d59f690d310cca7c8