[skia] Update call to SkImage::makeSubset (flutter#172456)

In https://skia-review.googlesource.com/c/skia/+/1021216, Skia removed
some legacy APIs. There was one usage still in Flutter and this fixes
that.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [ ] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

Author: kjlubick

engine/src/flutter/shell/platform/embedder/tests/embedder_unittests_util.cc

@@ -10,6 +10,7 @@
 #include "flutter/shell/platform/embedder/tests/embedder_test_backingstore_producer.h"
 #include "flutter/shell/platform/embedder/tests/embedder_unittests_util.h"
 
+#include "third_party/skia/include/core/SkCPURecorder.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkSurface.h"
 #include "third_party/skia/include/encode/SkPngEncoder.h"
@@ -168,8 +169,8 @@ bool ImageMatchesFixture(const std::string& fixture_file_name,
   FML_CHECK(scene_image) << "Invalid scene image.";
 
   auto scene_image_subset = scene_image->makeSubset(
-      nullptr,
-      SkIRect::MakeWH(fixture_image->width(), fixture_image->height()));
+      skcpu::Recorder::TODO(),
+      SkIRect::MakeWH(fixture_image->width(), fixture_image->height()), {});
 
   FML_CHECK(scene_image_subset)
       << "Could not create image subset for fixture comparison: "