Description of Change

FromEncodedData(SKData, SKRectI) creates an intermediate SKImage then calls .Subset(), but never disposes the intermediate when Subset() returns a different instance. Applied the standard same-instance safety pattern:

var image = FromEncodedData(data);
if (image == null)
    return null;

var result = image.Subset(subset);
if (result != image)
    image.Dispose();

return result;

Bugs Fixed

API Changes

None.

Behavioral Changes

The intermediate image is now disposed when Subset() returns a new instance, preventing a native resource leak.

Required skia PR

None.

PR Checklist

• Has tests (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Merged related skia PRs
• Changes adhere to coding standard
• Updated documentation

Tests omitted: existing SKImage tests cover this path; the fix is a mechanical application of the same-instance disposal pattern used throughout the codebase (e.g., ToRasterImage, other Subset call sites).