policy_hal: explicitly include audioclient and media headers

Explicitly inclide libaudioclient and libmedia headers to fix
compilation issue on latest LKG.

Change-Id: I24567bfa3cbbdd6c8079add5416c4e3a11a1d3ba
diff --git a/policy_hal/Android.mk b/policy_hal/Android.mk
index 41495aa..3ba9c14 100644
--- a/policy_hal/Android.mk
+++ b/policy_hal/Android.mk
@@ -17,8 +17,10 @@
                     $(call include-path-for, avextension) \
 
 LOCAL_HEADER_LIBRARIES := \
+        libaudioclient_headers \
         libaudiofoundation_headers \
         libbase_headers \
+        libmedia_headers \
         libstagefright_foundation_headers
 
 LOCAL_SHARED_LIBRARIES := \