foobnix/LibreraReader ? reverse-engineered prompt

I want to get this open source ebook reader running from this repo, mainly as an Android app. Please set it up so I can build and test a working reader that opens the formats the project already supports, like PDF, EPUB, MOBI, FB2, DjVu, CBZ, CBR, TXT, RTF, DOC, and DOCX, and keep the current app behavior instead of redesigning it.

Please make the build process as smooth as possible. If there are separate build paths for the regular app and an F Droid friendly version without Google services, make both work, but prioritize the easiest local build first. Handle the annoying setup pieces too, like the native PDF engine link, Android NDK requirements, signing keystore setup, and any optional Google or Firebase config, then tell me clearly what I still need to add by hand.

If the project is a bit outdated or frozen, only update what is necessary to get it compiling and running. You can look up current docs online if needed.