If a move has matching target/destination, signal the event as create or delete.

runtime/bin/file_system_watcher_android.cc

Index: runtime/bin/file_system_watcher_android.cc
diff --git a/runtime/bin/file_system_watcher_android.cc b/runtime/bin/file_system_watcher_android.cc
index 63a244a162dc7475766c1bf78060625a94651028..34329c12c48c467da3599d915cf0a66685944fe3 100644
--- a/runtime/bin/file_system_watcher_android.cc
+++ b/runtime/bin/file_system_watcher_android.cc
@@ -82,6 +82,7 @@ Dart_Handle FileSystemWatcher::ReadEvents(intptr_t id) {
     } else {
       Dart_ListSetAt(event, 2, Dart_Null());
     }
+    Dart_ListSetAt(event, 3, Dart_NewBoolean(e->mask & IN_MOVED_TO));
     Dart_ListSetAt(events, i, event);
     i++;
     offset += kEventSize + e->len;