goldfish-opengl: include <cstddef>

Helps with Meson build.

BUG=202552093
TEST=compile

Change-Id: Ie7bdb231d2ed5695587ef8a66e075ab6e1d16e16
diff --git a/system/OpenglSystemCommon/address_space_graphics_types.h b/system/OpenglSystemCommon/address_space_graphics_types.h
index 42c00f6..7f724c9 100644
--- a/system/OpenglSystemCommon/address_space_graphics_types.h
+++ b/system/OpenglSystemCommon/address_space_graphics_types.h
@@ -16,6 +16,7 @@
 #include "android/base/ring_buffer.h"
 
 #include <functional>
+#include <cstddef>
 
 // This file defines common types for address space graphics and provides
 // documentation.