VR: Move VR HWC DVR API to libdvr

Moved VR HWC API into a common API library.

Bug: 36050795
Test: Compiled
Change-Id: I1af32f4dedb7a6d4bb77a18d3c48cfbc8ea00a66
(cherry picked from commit 3d3fb3960f9c3956074496fd7fa1beb230ac1043)
7 files changed