Add correct libs to LOCAL_HEADER_LIBRARIES

Vendor code should not include AOSP headers
by absolute path or global path.
CRs-fixed: 2228157

Change-Id: I84a4d0b9b9fe3a20713eea07e926aba5d665b435
diff --git a/core/Android.mk b/core/Android.mk
index 1374b6c..c6b8b20 100644
--- a/core/Android.mk
+++ b/core/Android.mk
@@ -47,6 +47,7 @@
     $(LOCAL_PATH)/observer \
 
 LOCAL_HEADER_LIBRARIES := \
+    libutils_headers \
     libgps.utils_headers \
     libloc_pla_headers \
     liblocation_api_headers
diff --git a/utils/Android.mk b/utils/Android.mk
index 9607aaa..18c2203 100644
--- a/utils/Android.mk
+++ b/utils/Android.mk
@@ -40,6 +40,7 @@
 
 ## Includes
 LOCAL_HEADER_LIBRARIES := \
+    libutils_headers \
     libloc_pla_headers \
     liblocation_api_headers