COMPMID-3105: Update pad layer to PadV2

Adds the ability to set the padding value in the pad layer node.

Change-Id: I2f323146cbdfdfd6cfd617ee4bcafb5ffafedbbb
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2727
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/graph/Types.h b/arm_compute/graph/Types.h
index 7c81641..296f757 100644
--- a/arm_compute/graph/Types.h
+++ b/arm_compute/graph/Types.h
@@ -25,6 +25,7 @@
 #define ARM_COMPUTE_GRAPH_TYPES_H
 
 #include "arm_compute/core/Error.h"
+#include "arm_compute/core/PixelValue.h"
 #include "arm_compute/core/Types.h"
 #include "arm_compute/runtime/CL/CLTunerTypes.h"
 
@@ -45,6 +46,7 @@
 using arm_compute::TensorShape;
 using arm_compute::Size2D;
 using arm_compute::PermutationVector;
+using arm_compute::PixelValue;
 
 using arm_compute::ActivationLayerInfo;
 using arm_compute::DetectionOutputLayerInfo;