Ask ipwho.is only when needed; F-Droid draft as reviewed

[halilkhrmn]

This PR answers the F-Droid static review on fdroiddata!50840 (note 3950015262) and syncs the F-Droid draft.

The review. The reviewer checked VirusTotal (0/68), that the build matches our signed APK, the VPN scope and the argument policy, and found nothing wrong there. The one request: the app sent the phone's IP address to ipwho.is on first start, before the wizard, with no way to turn it off.

What changes.

• NetworkIdentity looks up the provider on each new network only when the automatic strategy is on and the wizard is done.
• A test the user starts (the Lab, or the wizard's "Test" button) can still look it up. The wizard no longer looks it up when it opens.
• New setting: Settings → "Look up the network provider". When it is off, no lookup happens at all.
• Without the lookup, the per-network memory still tells mobile operators apart (MCC+MNC). On Wi-Fi the profile's own strategy is used. See DECISIONS #27.
• The store descriptions (5 languages), the READMEs and the site now say what goes to ipwho.is, to GitHub and to the DNS server. "No tracking" became "no analytics".

F-Droid draft. docs/fdroid/ is now the MR's file as reviewed: only 0.2.0, pinned to its full commit hash, category VPN & Proxy.

Verified:

• :core:test and :app:testDebugUnitTest pass, and lint is unchanged.
• The store images were rendered again; the settings screen shows the new switch.
• Not yet checked on a phone with network traffic.