strat: use sf::NativeHandle for ipc templating

libraries/libstratosphere/source/usb/usb_remote_ds_endpoint.cpp

@@ -35,10 +35,15 @@ namespace ams::usb {
 
     Result RemoteDsEndpoint::GetCompletionEvent(sf::OutCopyHandle out) {
         serviceAssumeDomain(std::addressof(m_srv));
-        return serviceDispatch(std::addressof(m_srv), 2,
+
+        os::NativeHandle event_handle;
+        R_TRY((serviceDispatch(std::addressof(m_srv), 2,
             .out_handle_attrs = { SfOutHandleAttr_HipcCopy },
-            .out_handles = out.GetHandlePointer(),
-        );
+            .out_handles = std::addressof(event_handle),
+        )));
+
+        out.SetValue(event_handle, true);
+        return ResultSuccess();
     }
 
     Result RemoteDsEndpoint::GetUrbReport(sf::Out<usb::UrbReport> out) {