PR #1937 Test Build — Samsung One UI 7 TLS fix + .bit search

Test build from PR #1937 (commit 67fd48c).

What's in this build:

• ElectrumX cert pinning for Samsung One UI 7 (Android 16) compatibility
• TOFU cert pinning for custom servers with explicit user confirmation
• .onion fallback handling (pinned → trust-all)
• OEM TLS hardening (Xiaomi, OnePlus, GrapheneOS)
• Bare .bit domain resolution in search bar and user suggestions
• Test Connection diagnostics in Namecoin settings
• trustAllCerts → usePinnedTrustStore rename

APK: fdroid debug build, arm64-v8a