RPC: Restart commissioning after setting SpakeInfo

The CommissioningWindowManager now caches the CommssionableDataProvider
and therefore needs to be restarted after changing the SpakeInfo using
the RPC for testing.

examples/common/pigweed/rpc_services/Device.h

@@ -22,6 +22,7 @@
 #include <platform/CommissionableDataProvider.h>
 
 #include "app/clusters/ota-requestor/OTARequestorInterface.h"
+#include "app/server/CommissioningWindowManager.h"
 #include "app/server/OnboardingCodesUtil.h"
 #include "app/server/Server.h"
 #include "credentials/FabricTable.h"
@@ -418,6 +419,14 @@ class Device : public pw_rpc::nanopb::Device::Service<Device>
         {
             mCommissionableDataProvider.SetSpake2pVerifier(ByteSpan(request.verifier.bytes, request.verifier.size));
         }
+
+        // Resetart commissioning window to recache the value:
+        {
+            DeviceLayer::StackLock lock;
+            Server::GetInstance().GetCommissioningWindowManager().CloseCommissioningWindow();
+            Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow();
+        }
+
         return pw::OkStatus();
     }