Add Android target support (NuGet + native binaries)

[luthfiampas]

Would it be possible to add Android as a supported target? This would mean:

• Cross-compiling the native MuPDF C engine for Android ABIs.
• Packaging those .so binaries into the NuGet package (or a separate MuPDF.NET.Android package).
• Support for opening documents from a file descriptor/stream, since Android's scoped storage typically only provides a content URI/FD rather than a direct file path.

Thanks for considering it!

[MaksymTkachuk]

@luthfiampas
Android is a sensible fit for our packaging model.
It’s under consideration, but not scheduled for a release yet, so we can’t promise timing.

Documents can already be opened from byte[] or Stream, which often works if you can read the content URI into memory — but we don’t yet expose a dedicated open-from-FD API, and Android isn’t a supported RID.

Happy to keep you posted as this moves forward.
Thanks.

[luthfiampas]

Thanks for the quick and clear response! Will keep an eye on this issue for updates on Android RID support. Appreciate it!