Add VTS test cases for CAS AIDL

Bug: 230377377, 227673974
Test: atest VtsHalCasAidlTargetTest
Change-Id: If0797975bec961c8388c75260f04c21eb09a169f
diff --git a/cas/aidl/vts/functional/OWNERS b/cas/aidl/vts/functional/OWNERS
new file mode 100644
index 0000000..4c55752
--- /dev/null
+++ b/cas/aidl/vts/functional/OWNERS
@@ -0,0 +1,3 @@
+# Bug component: 1344
+quxiangfang@google.com
+hgchen@google.com