IVGCVSW-5387 TfLiteDelegate: Implement the Pooling operators

 * Implement MaxPool2d operators
 * Add QAsymmS8 to armnn delegate
 * Unit tests

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I1815ade6ccda3e9331bd3a68e164be0f6947e9df
diff --git a/delegate/CMakeLists.txt b/delegate/CMakeLists.txt
index 0a1a3e4..e05a0ba 100644
--- a/delegate/CMakeLists.txt
+++ b/delegate/CMakeLists.txt
@@ -95,6 +95,8 @@
         src/test/ElementwiseBinaryTestHelper.hpp
         src/test/ElementwiseUnaryTest.cpp
         src/test/ElementwiseUnaryTestHelper.hpp
+        src/test/Pooling2dTest.cpp
+        src/test/Pooling2dTestHelper.hpp
         src/test/QuantizationTest.cpp
         src/test/QuantizationTestHelper.hpp)
 
@@ -159,4 +161,4 @@
         FILE        ${CMAKE_CURRENT_BINARY_DIR}/ArmnnDelegateTargets.cmake
         NAMESPACE   ArmnnDelegate::)
 
-####################################################
\ No newline at end of file
+####################################################