Add dev.imranr.obtainium

Required

• The app complies with the inclusion criteria
• The original app author has been notified (and does not oppose the inclusion) (https://github.com/ImranR98/Obtainium/pull/236#issuecomment-1406988952)
• All related fdroiddata and RFP issues have been referenced in this merge request
• Builds with fdroid build

Strongly Recommended

• The upstream app source code repo contains the app metadata (summary/description/images/changelog/etc) in a Fastlane or Triple-T folder structure
• Releases are tagged

Suggested

• External repos are added as git submodules instead of srclibs
• Enable Reproducible Builds
• Multiple apks for native code

---

We need to see if the reproducible build works to avoid issues when obtainium try to update itself. If the reproducible build doesn't work, a pull request is ready on the project: https://github.com/ImranR98/Obtainium/pull/236. Then we need to update this (fdroiddata) PR to change the packageId and the build command.

Thanks :)