frameworks/base: use proper nativehelper headers

libnativehelper exports headers under nativehelper. These were
available before incorrectly as global headers in order to give
access to jni.h.

Test: modules using frameworks/base find headers
Bug: 63762847
Change-Id: I0f9f231acdebe460f279135462f43d3e32eff64d
diff --git a/core/jni/android_os_VintfRuntimeInfo.cpp b/core/jni/android_os_VintfRuntimeInfo.cpp
index ecb6854..19220cf0 100644
--- a/core/jni/android_os_VintfRuntimeInfo.cpp
+++ b/core/jni/android_os_VintfRuntimeInfo.cpp
@@ -17,7 +17,7 @@
 #define LOG_TAG "VintfRuntimeInfo"
 //#define LOG_NDEBUG 0
 
-#include <JNIHelp.h>
+#include <nativehelper/JNIHelp.h>
 #include <vintf/VintfObject.h>
 #include <vintf/parse_string.h>
 #include <vintf/parse_xml.h>