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_view_InputDevice.cpp b/core/jni/android_view_InputDevice.cpp
index 4e6e512..494fad7 100644
--- a/core/jni/android_view_InputDevice.cpp
+++ b/core/jni/android_view_InputDevice.cpp
@@ -20,7 +20,7 @@
 #include <jni.h>
 #include <nativehelper/JNIHelp.h>
 
-#include <ScopedLocalRef.h>
+#include <nativehelper/ScopedLocalRef.h>
 
 #include "android_view_InputDevice.h"
 #include "android_view_KeyCharacterMap.h"