Stub out VTS testing for OBD2 sensors

This commit adds support to VHAL for returning a live and a freeze OBD2 frame filled in with default placeholder values
It also adds a VTS test to check for OBD2 support. Doing anything more interesting is currently blocked.

Test: make vts BUILD_GOOGLE_VTS=true -j32 && vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VehicleHidlTest -l INFO
Change-Id: I4aad71f7bb65a690841e74d06fefc5fb2076ce5e
diff --git a/vehicle/2.0/default/impl/DefaultConfig.h b/vehicle/2.0/default/impl/DefaultConfig.h
index 77ee9d4..12c1c1b 100644
--- a/vehicle/2.0/default/impl/DefaultConfig.h
+++ b/vehicle/2.0/default/impl/DefaultConfig.h
@@ -159,6 +159,18 @@
         .prop = VehicleProperty::IGNITION_STATE,
         .access = VehiclePropertyAccess::READ,
         .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+    },
+
+    {
+        .prop = VehicleProperty::OBD2_LIVE_FRAME,
+        .access = VehiclePropertyAccess::READ,
+        .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
+    },
+
+    {
+        .prop = VehicleProperty::OBD2_FREEZE_FRAME,
+        .access = VehiclePropertyAccess::READ,
+        .changeMode = VehiclePropertyChangeMode::ON_CHANGE,
     }
 };