Bug 1645904 - Fix swapped parameters for nsIAccessibleVirtualCursorChangeEvent r=eeejay

The fields are unused, but there's no reason to propagate them
incorrectly.

Differential Revision: https://phabricator.services.mozilla.com/D134907

accessible/ipc/DocAccessibleParent.cpp

@@ -549,7 +549,7 @@ mozilla::ipc::IPCResult DocAccessibleParent::RecvVirtualCursorChangeEvent(
           GetXPCAccessible(target), doc, nullptr, aFromUser,
           GetXPCAccessible(oldPosition), aOldStartOffset, aOldEndOffset,
           GetXPCAccessible(newPosition), aNewStartOffset, aNewEndOffset,
-          aBoundaryType, aReason);
+          aReason, aBoundaryType);
   nsCoreUtils::DispatchAccEvent(std::move(event));
 
   return IPC_OK();