Suppress gtest error for tests without any instance

Bug: 162052785
Test: m -j vts
Change-Id: I58bc808a82b2128bb8774f762f9b9fcecd2614fb
diff --git a/cas/1.0/vts/functional/VtsHalCasV1_0TargetTest.cpp b/cas/1.0/vts/functional/VtsHalCasV1_0TargetTest.cpp
index 0f16de5..7f5d988 100644
--- a/cas/1.0/vts/functional/VtsHalCasV1_0TargetTest.cpp
+++ b/cas/1.0/vts/functional/VtsHalCasV1_0TargetTest.cpp
@@ -837,6 +837,7 @@
 
 }  // anonymous namespace
 
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(MediaCasHidlTest);
 INSTANTIATE_TEST_SUITE_P(
         PerInstance, MediaCasHidlTest,
         testing::ValuesIn(android::hardware::getAllHalInstanceNames(IMediaCasService::descriptor)),