policy_hal: Remove the AOSP header paths.

Remove the AOSP header paths and add them through
corresponding header library.

Change-Id: I55434d49bc2251c874fc0a974f1b8a43ab90d6cc
diff --git a/policy_hal/Android.mk b/policy_hal/Android.mk
index 3d72de4..9a90df9 100644
--- a/policy_hal/Android.mk
+++ b/policy_hal/Android.mk
@@ -14,8 +14,9 @@
                     $(TOPDIR)frameworks/av/services/audiopolicy \
                     $(TOPDIR)frameworks/av/services/audiopolicy/common/managerdefinitions/include \
                     $(call include-path-for, avextension) \
-                    $(TOPDIR)system/core/base/include
 
+LOCAL_HEADER_LIBRARIES := \
+        libbase_headers
 
 LOCAL_SHARED_LIBRARIES := \
     libcutils \