Add A2DP Sink Support

Change-Id: I9affefdd2d00597545e49c593ef3bddb110d4c9c
diff --git a/Android.mk b/Android.mk
index f0f6970..a44ad1b 100644
--- a/Android.mk
+++ b/Android.mk
@@ -10,6 +10,7 @@
 endif
 
 bdroid_CFLAGS += -Wall -Werror
+bdroid_CFLAGS += -DBTA_AVK_INCLUDED
 
 include $(call all-subdir-makefiles)