Fix test by making darwin-framework-tool use the same command timeout as chip-tool.

Author: bzbarsky-apple

examples/darwin-framework-tool/commands/clusters/ModelCommandBridge.h

@@ -38,7 +38,7 @@ class ModelCommand : public CHIPCommandBridge
 
     /////////// CHIPCommand Interface /////////
     CHIP_ERROR RunCommand() override;
-    chip::System::Clock::Timeout GetWaitDuration() const override { return chip::System::Clock::Seconds16(10); }
+    chip::System::Clock::Timeout GetWaitDuration() const override { return chip::System::Clock::Seconds16(20); }
 
     virtual CHIP_ERROR SendCommand(MTRBaseDevice * _Nonnull device, chip::EndpointId endPointId) = 0;