Dump XML files in aapt2 dump

Test: manual
Change-Id: Id7f656c1385f6d1fec8eaa993c8e2b36bb1ae5b0
diff --git a/tools/aapt2/Debug.h b/tools/aapt2/Debug.h
index 6209a04..382707e 100644
--- a/tools/aapt2/Debug.h
+++ b/tools/aapt2/Debug.h
@@ -37,7 +37,7 @@
                          text::Printer* printer);
   static void PrintStyleGraph(ResourceTable* table, const ResourceName& target_style);
   static void DumpHex(const void* data, size_t len);
-  static void DumpXml(const xml::XmlResource& doc);
+  static void DumpXml(const xml::XmlResource& doc, text::Printer* printer);
 };
 
 }  // namespace aapt