ART: Let benchmarks import new header library

Get jni.h from jni_headers.

Test: m
Change-Id: I667343ef45c630365cdcb16a2e641276ceaebe27
diff --git a/benchmark/Android.bp b/benchmark/Android.bp
index d0dfec9..606734b 100644
--- a/benchmark/Android.bp
+++ b/benchmark/Android.bp
@@ -58,9 +58,7 @@
     ],
     static_libs: [
     ],
-    include_dirs: [
-        "libnativehelper/include/nativehelper"  // only for jni.h
-    ],
+    header_libs: ["jni_headers"],
     stl: "libc++_static",
     clang: true,
     target: {