3467 activate silently ntfy on push murena com

Description

ntfy as been added in /e/OS as the foundation.e.ntfy app since a few versions. But it is disabled by default, and it will use ntfy.sh server.

The Broadcasting notification project also includes hosting of an ntfy instance on push.murena.com domain (https://gitlab.e.foundation/groups/e/os/-/epics/39#note_701302).

• To make use of this infra as expected, we have to update the URL in foundation.e.ntfy code
• To have the broadcasting notification system working out of the box, we have to activate ntfy by default in /e/OS
• To avoid user deactivate it UnitifedPush provider without proper feedback, remove the possibility to disable it through UI

Screenshots

Technical details

Revert the /e/OS modifications made on ntfy which added the MainSettingsActivity, and its registration in settings app.

Tests

• Observe that the UnifiedPush entry isn't visible anymore in the Settings -> System screen
• Check that UnifiedPush is working (using direct messages in Pachli app for example, and lookng for "ntfy" logs in logcat, and that the push URI mention push.murena.com )

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/3467

10 commandments of code review

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Summary by CodeRabbit

• New Features
  • Background listener now restarts automatically when needed for instant subscriptions.
• Bug Fixes
  • Foreground notification is cleared properly when the background service stops.
• UI/Style
  • Notification icon updated: larger and consistently white for improved visibility.
• Changes
  • Default server URL updated to https://push.murena.com.
• Refactor
  • Removed the in-app EOS settings screen and its Android Settings entry to streamline the experience.
• Chores
  • Cleaned up build repositories and unused dependencies.