Extract out audio DSP code to utility library

Change-Id: Ib8ce72028a7ea30e82baa518e381370e820ebbd0
diff --git a/services/audioflinger/Android.mk b/services/audioflinger/Android.mk
index fa49592..52834db 100644
--- a/services/audioflinger/Android.mk
+++ b/services/audioflinger/Android.mk
@@ -11,9 +11,11 @@
     AudioPolicyService.cpp
 
 LOCAL_C_INCLUDES := \
-    system/media/audio_effects/include
+    system/media/audio_effects/include \
+    system/media/audio_utils/include
 
 LOCAL_SHARED_LIBRARIES := \
+    libaudioutils \
     libcutils \
     libutils \
     libbinder \