Add OWNERS for VTS module VtsHalDrmV1_2TargetTest

Each VTS module is required to have OWNERS file. The ownership is based on
go/vts-owners. For more information about ownership policy, please visit
go/xts-owners-policy.

Test: Tree Hugger
Bug: 143903671
Change-Id: Ib17a60ebda5ae6a682f1a8f9cbfd532d0080ace7