cas-vts: use MemoryDealer to allocate shared memory

cas hal can't (and doesn't need to) use hidl_memory allocated by
hidl allocator. All real clients (MediaDescrambler jni, ACodec)
are using MemoryDealer-allocated ashmem only. Modify the test
to cover these cases.

bug: 67603039
test:
> make vts -j64
> vts-tradefed run vts -m VtsHalCasV1_0Target

Change-Id: Ib9563abc1a14c34781a28d15c7766c6c160d288a
diff --git a/cas/1.0/vts/functional/Android.bp b/cas/1.0/vts/functional/Android.bp
index 872bb2c..e1e09e9 100644
--- a/cas/1.0/vts/functional/Android.bp
+++ b/cas/1.0/vts/functional/Android.bp
@@ -25,5 +25,8 @@
         "android.hidl.memory@1.0",
         "libhidlmemory",
     ],
+    shared_libs: [
+        "libbinder",
+    ],
 }