Move rs.h includes to source files.

Change-Id: Ic49e3fa5580c67f35a21f95872794ea03dd114b6
diff --git a/cpp/ScriptIntrinsics.cpp b/cpp/ScriptIntrinsics.cpp
index 1284736..4a39d0e 100644
--- a/cpp/ScriptIntrinsics.cpp
+++ b/cpp/ScriptIntrinsics.cpp
@@ -18,6 +18,7 @@
 #include <malloc.h>
 
 #include "RenderScript.h"
+#include <rs.h>
 #include "rsDefines.h"
 
 using namespace android;