Make vdc a C++ file as a base for further improvement.

Bug: 19704432
Change-Id: I784e8a91d3b0f4d6cd0dc668e9e55d0290f768e8
diff --git a/Android.mk b/Android.mk
index d4a178a..4052b7d 100644
--- a/Android.mk
+++ b/Android.mk
@@ -98,7 +98,7 @@
 
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 LOCAL_CLANG := true
-LOCAL_SRC_FILES:= vdc.c
+LOCAL_SRC_FILES:= vdc.cpp
 LOCAL_MODULE:= vdc
 LOCAL_SHARED_LIBRARIES := libcutils
 LOCAL_CFLAGS := $(vold_cflags)