New app: Night Drop (app.nightdrop)

Required

• The app complies with the inclusion criteria
• The original app author has been notified (and does not oppose the inclusion) — I am the app author.
• All related fdroiddata and RFP issues have been referenced in this merge request — there is no prior RFP or fdroiddata issue for this app.
• Builds with fdroid build and all pipelines pass
• There is an issue tracker and contact info of the author so that we can report bugs and contact the author.

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 and auto update is enabled

Suggested

• External repos are added as git submodules instead of srclibs — Flutter is provisioned with the flutter@stable srclib, following the srclib variant of templates/build-flutter.yml; it is not vendored as a submodule upstream. The Flutter version is pinned in app/.fvmrc and extracted by the recipe, so bumping it needs no change here either.
• Enable Reproducible Builds
• Multiple apks for native code — built per ABI (armeabi-v7a / arm64-v8a / x86_64), 35–46 MB each instead of one 113 MB universal APK.