IVGCVSW-6946 Add Pool3D to tflite delegate

 * Add new test and test helper for Pool3d
 * Add new custom operator to switch in armnn_delegate.cpp
 * Add new pool3d function to pooling.hpp
 * Update doxygen

Signed-off-by: Ryan OShea <ryan.oshea3@arm.com>
Change-Id: I77a541bf423b337c749e70c564cdd727efe2fd05
diff --git a/delegate/CMakeLists.txt b/delegate/CMakeLists.txt
index d488de4..523214b 100644
--- a/delegate/CMakeLists.txt
+++ b/delegate/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+# Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
 # SPDX-License-Identifier: MIT
 #
 
@@ -177,6 +177,8 @@
         src/test/PadTestHelper.hpp
         src/test/Pooling2dTest.cpp
         src/test/Pooling2dTestHelper.hpp
+        src/test/Pooling3dTest.cpp
+        src/test/Pooling3dTestHelper.hpp
         src/test/PreluTest.cpp
         src/test/PreluTestHelper.hpp
         src/test/QuantizationTest.cpp