Quick affordance to open the camera in video mode.

Also updates the older, normal camera config:
1. Don't show it if there's no camera app, tests included
2. Use the camera icon and reserve the video camera icon to the new
   video camera config (done in coordination with UX)

Fix: 265316887
Test: unit tests
Test: manually made sure that the video camera shortcut works
Change-Id: Ie3551f9a79a8df98d30e0f16e931fcea82171a39