Add VTS tests for EVS HAL

Note:  This change list was developed as ag/2031642 on master, but
cherry picks are broken at the moment, so reapplying directly to oc-dev.
The change in master will be abandoned in favor of the auto-merger.

Test:  Run them against the default (mock) driver on bat_land
Change-Id: I7ae523eb6a18ce6a1d0dcd8494f335ffa77f34f1