libbatteryservice_headers: export libutils_headers

Fixes build error.
Test: cd hardware/interfaces/health/1.0 && mma -j

Change-Id: Id48f7d6902f35d30d76a24146ec465b8e65188e4
Merged-In: Id48f7d6902f35d30d76a24146ec465b8e65188e4
(cherry picked from commit eddca62d2a4b8455fa189983716a0de9d440325b)
diff --git a/services/batteryservice/Android.bp b/services/batteryservice/Android.bp
index 1216553..7e2f648 100644
--- a/services/batteryservice/Android.bp
+++ b/services/batteryservice/Android.bp
@@ -2,4 +2,6 @@
     name: "libbatteryservice_headers",
     vendor_available: true,
     export_include_dirs: ["include"],
+    header_libs: ["libutils_headers"],
+    export_header_lib_headers: ["libutils_headers"],
 }