Remove some global headers.

Removing:
- JniInvocation.h
- ScopedLocalFrame.h

Now that all usage is cleaned up.

libnativehelper now exports "include" as well so that
its headers can be cleaned up in the same way.

Test: none
Bug: 63762847
Change-Id: Iee8f59542dc1c80e2e262d2faf4eea829426a0d8
diff --git a/JniConstants.cpp b/JniConstants.cpp
index bf8a955..f42de2f 100644
--- a/JniConstants.cpp
+++ b/JniConstants.cpp
@@ -17,8 +17,8 @@
 #define LOG_TAG "JniConstants"
 
 #include "ALog-priv.h"
-#include "JniConstants.h"
-#include "ScopedLocalRef.h"
+#include <nativehelper/JniConstants.h>
+#include <nativehelper/ScopedLocalRef.h>
 
 #include <stdlib.h>