adding lock and unlock for window app (#26276)

Author: chirag-silabs

examples/window-app/silabs/SiWx917/src/WindowAppImpl.cpp

@@ -167,7 +167,9 @@ void WindowAppImpl::OnTaskCallback(void * parameter)
     }
     SILABS_LOG("APP: Done WiFi Init");
     /* We will init server when we get IP */
+    chip::DeviceLayer::PlatformMgr().LockChipStack();
     sWiFiNetworkCommissioningInstance.Init();
+    chip::DeviceLayer::PlatformMgr().UnlockChipStack();
     /* added for commissioning with wifi */
 #endif
 

examples/window-app/silabs/efr32/src/WindowAppImpl.cpp

@@ -168,7 +168,9 @@ void WindowAppImpl::OnTaskCallback(void * parameter)
     }
     SILABS_LOG("APP: Done WiFi Init");
     /* We will init server when we get IP */
+    chip::DeviceLayer::PlatformMgr().LockChipStack();
     sWiFiNetworkCommissioningInstance.Init();
+    chip::DeviceLayer::PlatformMgr().UnlockChipStack();
     /* added for commisioning with wifi */
 #endif