make VtsHalHidlTestUtils vendor_available so vts tests can be vendor: true.

Bug: 231517902

Test: build vendor VtsHalCameraProviderV2_4TargetTest

Change-Id: I8cb0cc165fcde843313fd25b56bfacdc0c166df9
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>

runners/target/vts_hal_hidl_target/Android.bp

diff --git a/runners/target/vts_hal_hidl_target/Android.bp b/runners/target/vts_hal_hidl_target/Android.bp
index 363715a..c5d530f 100644
--- a/runners/target/vts_hal_hidl_target/Android.bp
+++ b/runners/target/vts_hal_hidl_target/Android.bp
@@ -25,6 +25,7 @@
         "VtsCoreUtil.cpp",
     ],
 
+    vendor_available: true,
     cflags: ["-Wall", "-Werror"],
 
     shared_libs: [