Prepare to move system/media

Change-Id: I68035688c78e428746762eae3cc572f329d8f7cb
diff --git a/libaudio/Android.mk b/libaudio/Android.mk
index 1d9b125..3da74c3 100644
--- a/libaudio/Android.mk
+++ b/libaudio/Android.mk
@@ -43,7 +43,7 @@
     AudioHardware.cpp
 
 LOCAL_C_INCLUDES += \
-    system/media/audio_effects/include
+    $(call include-path-for, audio-effects)
 
 LOCAL_CFLAGS += -fno-short-enums