libnativehelper is implicitly available.

(And is moving for the PDK.)

Bug: 6369821
Change-Id: I9e082ef294cfb2d70384255eb06d97d8cb92b382
diff --git a/native/android/Android.mk b/native/android/Android.mk
index e2c99ee..00d11da 100644
--- a/native/android/Android.mk
+++ b/native/android/Android.mk
@@ -30,8 +30,7 @@
 
 LOCAL_C_INCLUDES += \
     frameworks/base/native/include \
-    frameworks/base/core/jni/android \
-    dalvik/libnativehelper/include/nativehelper
+    frameworks/base/core/jni/android
 
 LOCAL_MODULE:= libandroid