Fix windows build of AAPT2

Change-Id: Ib8e1a4322510b582e9600a08d3118842c9abc73c
diff --git a/tools/aapt2/XliffXmlPullParser.h b/tools/aapt2/XliffXmlPullParser.h
index d362521..d4aa222 100644
--- a/tools/aapt2/XliffXmlPullParser.h
+++ b/tools/aapt2/XliffXmlPullParser.h
@@ -19,6 +19,7 @@
 
 #include "XmlPullParser.h"
 
+#include <memory>
 #include <string>
 
 namespace aapt {