Add StridedSliceLayerNode to graph API

Signed-off-by: thecha01 <theo.charalambous@arm.com>
Change-Id: I6d6fb2b053c74e35a86841621486bc0cd34b12b3
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3911
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/graph/backends/ValidateHelpers.h b/arm_compute/graph/backends/ValidateHelpers.h
index 0259bfb..fcebc5c 100644
--- a/arm_compute/graph/backends/ValidateHelpers.h
+++ b/arm_compute/graph/backends/ValidateHelpers.h
@@ -556,6 +556,32 @@
     return SliceLayer::validate(input, output, starts, ends);
 }
 
+/** Validates a Strided Slice layer node
+ *
+ * @tparam StridedSliceLayer Strided Slice layer function type
+ *
+ * @param[in] node Node to validate
+ *
+ * @return Status
+ */
+template <typename StridedSliceLayer>
+Status validate_strided_slice_layer(StridedSliceLayerNode &node)
+{
+    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Validating StridedSlice node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_inputs() != 1);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_outputs() != 1);
+
+    // Extract IO and info
+    arm_compute::ITensorInfo   *input   = get_backing_tensor_info(node.input(0));
+    arm_compute::ITensorInfo   *output  = get_backing_tensor_info(node.output(0));
+    const Coordinates           starts  = node.starts();
+    const Coordinates           ends    = node.ends();
+    const BiStrides             strides = node.strides();
+    const StridedSliceLayerInfo info    = node.strided_slice_info();
+
+    return StridedSliceLayer::validate(input, output, starts, ends, strides, info.begin_mask(), info.end_mask(), info.shrink_axis_mask());
+}
+
 /** Validates a Upsample layer node
  *
  * @tparam UpsampleLayer Upsample layer type