Make VtsHalCameraService2_0TargetTest a vendor test.

This is so that the vts test uses the vendor variant of vndk
dependencies simulating what vendor clients would actually see.

Bug: 231517902

Test: ldd VtsHalCameraService2_0TargetTest; See that it uses vendor
      variant of libcamera_metadata

Change-Id: I038dee565f31351e762f1663356785279878a319
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>