[Impeller] dont use concurrent runner to decode images on Android.

lib/ui/painting/image_decoder_impeller.cc

@@ -456,7 +456,11 @@ void ImageDecoderImpeller::Decode(fml::RefPtr<ImageDescriptor> descriptor,
     });
   };
 
+#ifdef FML_OS_ANDROID
+  runners_.GetIOTaskRunner()->PostTask(
+#else
   concurrent_task_runner_->PostTask(
+#endif
       [raw_descriptor,                                            //
        context = context_.get(),                                  //
        target_size = SkISize::Make(target_width, target_height),  //
@@ -495,12 +499,16 @@ void ImageDecoderImpeller::Decode(fml::RefPtr<ImageDescriptor> descriptor,
             result(image, decode_error);
           }
         };
-        // TODO(jonahwilliams):
-        // https://github.com/flutter/flutter/issues/123058 Technically we
-        // don't need to post tasks to the io runner, but without this
-        // forced serialization we can end up overloading the GPU and/or
-        // competing with raster workloads.
+// TODO(jonahwilliams):
+// https://github.com/flutter/flutter/issues/123058 Technically we
+// don't need to post tasks to the io runner, but without this
+// forced serialization we can end up overloading the GPU and/or
+// competing with raster workloads.
+#ifdef FML_OS_ANDROID
+        upload_texture_and_invoke_result();
+#else
         io_runner->PostTask(upload_texture_and_invoke_result);
+#endif
       });
 }