IVGCVSW-4259 Add frontend and reference workload for UnaryOperationLayer

* Added new layer named ElementwiseUnary
* Deprecated existing Abs/Rsqrt layer functions
* Updated existing Abs/Rsqrt test infrastructure to use new layer
* Added boilerplate for new Exp,Neg,Sqrt elemwise op layers
* AbsQuantize test removed pending future commit
* Serialization support added

!android-nn-driver:2550

Change-Id: Ic595c645925e17b45db568187fd05646daf2e87f
Signed-off-by: josh minor <josh.minor@arm.com>
diff --git a/src/backends/neon/test/NeonEndToEndTests.cpp b/src/backends/neon/test/NeonEndToEndTests.cpp
index e1c929b..4e9fe0f 100644
--- a/src/backends/neon/test/NeonEndToEndTests.cpp
+++ b/src/backends/neon/test/NeonEndToEndTests.cpp
@@ -5,13 +5,13 @@
 
 #include <backendsCommon/test/EndToEndTestImpl.hpp>
 
-#include <backendsCommon/test/AbsEndToEndTestImpl.hpp>
 #include <backendsCommon/test/ArgMinMaxEndToEndTestImpl.hpp>
 #include <backendsCommon/test/ComparisonEndToEndTestImpl.hpp>
 #include <backendsCommon/test/ConcatEndToEndTestImpl.hpp>
 #include <backendsCommon/test/DepthToSpaceEndToEndTestImpl.hpp>
 #include <backendsCommon/test/DequantizeEndToEndTestImpl.hpp>
 #include <backendsCommon/test/DetectionPostProcessEndToEndTestImpl.hpp>
+#include <backendsCommon/test/ElementwiseUnaryEndToEndTestImpl.hpp>
 #include <backendsCommon/test/InstanceNormalizationEndToEndTestImpl.hpp>
 #include <backendsCommon/test/PreluEndToEndTestImpl.hpp>
 #include <backendsCommon/test/QuantizedLstmEndToEndTestImpl.hpp>
@@ -28,7 +28,15 @@
 // Abs
 BOOST_AUTO_TEST_CASE(NeonAbsEndToEndTestFloat32)
 {
-    AbsEndToEnd<armnn::DataType::Float32>(defaultBackends);
+    std::vector<float> expectedOutput =
+    {
+        1.f, 1.f, 1.f, 1.f, 5.f, 5.f, 5.f, 5.f,
+        3.f, 3.f, 3.f, 3.f, 4.f, 4.f, 4.f, 4.f
+    };
+
+    ElementwiseUnarySimpleEndToEnd<armnn::DataType::Float32>(defaultBackends,
+                                                             UnaryOperation::Abs,
+                                                             expectedOutput);
 }
 
 // Constant