Add an option to set image preprocessing backend as gpu.

PiperOrigin-RevId: 483888202

mediapipe/tasks/cc/vision/image_segmenter/image_segmenter_graph.cc

@@ -243,8 +243,10 @@ class ImageSegmenterGraph : public core::ModelTaskGraph {
     // stream.
     auto& preprocessing =
         graph.AddNode("mediapipe.tasks.components.ImagePreprocessingSubgraph");
+    bool use_gpu = components::DetermineImagePreprocessingGpuBackend(
+        task_options.base_options().acceleration());
     MP_RETURN_IF_ERROR(ConfigureImagePreprocessing(
-        model_resources,
+        model_resources, use_gpu,
         &preprocessing
              .GetOptions<tasks::components::ImagePreprocessingOptions>()));
     image_in >> preprocessing.In(kImageTag);