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/reference/workloads/RefWorkloads.hpp b/src/backends/reference/workloads/RefWorkloads.hpp
index 1f9ad4a..7034b67 100644
--- a/src/backends/reference/workloads/RefWorkloads.hpp
+++ b/src/backends/reference/workloads/RefWorkloads.hpp
@@ -5,7 +5,6 @@
 
 #pragma once
 
-#include "Abs.hpp"
 #include "Activation.hpp"
 #include "ArgMinMax.hpp"
 #include "BatchNormImpl.hpp"
@@ -15,7 +14,6 @@
 #include "FullyConnected.hpp"
 #include "Gather.hpp"
 #include "Pooling2d.hpp"
-#include "RefAbsWorkload.hpp"
 #include "RefActivationWorkload.hpp"
 #include "RefArgMinMaxWorkload.hpp"
 #include "RefBatchNormalizationWorkload.hpp"
@@ -33,6 +31,7 @@
 #include "RefDetectionPostProcessWorkload.hpp"
 #include "RefDequantizeWorkload.hpp"
 #include "RefElementwiseWorkload.hpp"
+#include "RefElementwiseUnaryWorkload.hpp"
 #include "RefFullyConnectedWorkload.hpp"
 #include "RefFloorWorkload.hpp"
 #include "RefFakeQuantizationFloat32Workload.hpp"
@@ -51,7 +50,6 @@
 #include "RefReshapeWorkload.hpp"
 #include "RefResizeBilinearWorkload.hpp"
 #include "RefResizeWorkload.hpp"
-#include "RefRsqrtWorkload.hpp"
 #include "RefSliceWorkload.hpp"
 #include "RefSplitterWorkload.hpp"
 #include "RefSoftmaxWorkload.hpp"