Add bulk exclude/include all apps from tracker monitoring

[kasnder]

Summary

Addresses #522 — users with many installed apps currently must configure tracker monitoring one app at a time, which is impractical.

This adds two actions in Advanced Settings (for experts):

• Exclude all apps from tracking — bulk-disables tracker monitoring for all installed apps, so users can then selectively re-enable the ones they care about
• Include all apps in tracking — resets all apps back to monitored (the default)

Both actions show a confirmation dialog before proceeding. Both are hidden in minimal blocking mode, where per-app tracker toggles don't apply.

Changes

• preferences.xml: Two new Preference buttons in the advanced options screen
• ActivitySettings.java: Click handlers with confirmation dialogs + setTrackerProtectionForAll() helper that bulk-writes the tracker_protect SharedPreferences and reloads the VPN service
• strings.xml: Labels and summaries for the new actions

Design decisions

• Placed in advanced settings rather than the main screen to avoid encouraging users to disable protection — tracker monitoring stays on by default for all apps
• Uses the existing Util.areYouSure() confirmation pattern
• Reuses Rule.getPackages() to enumerate installed apps

Test plan

• Open Settings > Advanced options and verify both new buttons appear
• Tap "Exclude all apps from tracking" → confirm → verify all apps show as unprotected in the main list
• Tap "Include all apps in tracking" → confirm → verify all apps show as protected again
• Switch to minimal blocking mode and verify both buttons are hidden
• Verify newly installed apps after an "exclude all" still default to protected

https://claude.ai/code/session_01Su29k626TdMqFnnNX8iAGK