IVGCVSW-6009 Enable creating thread pool with 1 thread

* Allow the user to use create a tread pool with a single thread
* This is in keeping with how the android-nn-driver was implemented
* Add it to ExecuteNetwork thread pool creation

Signed-off-by: Kevin May <kevin.may@arm.com>
Change-Id: I05b8048a9e0e45ae11d2b585080af28d9d008d81
diff --git a/tests/ExecuteNetwork/ExecuteNetwork.cpp b/tests/ExecuteNetwork/ExecuteNetwork.cpp
index cd760a8..e8d5b18 100644
--- a/tests/ExecuteNetwork/ExecuteNetwork.cpp
+++ b/tests/ExecuteNetwork/ExecuteNetwork.cpp
@@ -440,7 +440,7 @@
             }
         }
         // Asynchronous execution using the Arm NN thread pool
-        else if (params.m_ThreadPoolSize >= 2)
+        else if (params.m_ThreadPoolSize >= 1)
         {
             try
             {