Add PhoneBlock Mobile - community spam call blocker

New app: PhoneBlock Mobile

App ID: de.haumacher.phoneblock_mobile

License: GPL-3.0-only

Source: https://github.com/haumacher/phoneblock

Website: https://phoneblock.net

PhoneBlock Mobile is a community-driven spam call blocker for Android. It uses Android's CallScreeningService to check incoming calls against the PhoneBlock spam database and blocks known spam callers automatically.

Built with Flutter. All dependencies are FOSS (no Google Play Services/Firebase).

Anti-feature: NonFreeNet (requires phoneblock.net for spam lookups).

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

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: In preparation: https://github.com/haumacher/phoneblock/tree/fdroid-deploy/phoneblock_mobile/android/fastlane/

• 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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