New app: UpVPN

Required

• The app complies with the inclusion criteria
• The original app author has been notified (and does not oppose the inclusion)
• All related fdroiddata and RFP issues have been referenced in this merge request
• Builds with fdroid build and all pipelines pass
  • Passing Build: https://gitlab.com/gigapotential/fdroiddata/-/pipelines/1083560569

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
  • metadata directory at root of the upvpn-app repo: https://github.com/upvpn/upvpn-app/tree/main/metadata/en-US
• Releases are tagged

Suggested

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

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Closes rfp#2587 (closed)

This is my first submission I'm the author of the app as well, please let me know if there's anything missing. Thank you - Himanshu (he/him)