RFR: 8361286: Allow enabling of background loading for images loaded from an InputStream

[Kevin Rushforth]

On Mon, 18 Aug 2025 09:35:23 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> Support background loading of raw input streams
> 
> - Fixed generics (mix up of two ImageLoader types)
> - Removed unused code for handling headers, methods, request parameters
> - Use `long` for progress as streams may exceed 2 GB
> - Improved documentation of Image regarding background loading

This will need a CSR. The newly proposed constructors should have an `@since` tag.

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PR Comment: https://git.openjdk.org/jfx/pull/1875#issuecomment-3198218532