feat: Add satellite network access for API

[aclaghorn]

Motivation

Android gates satellite/constrained links behind an explicit app opt-in (https://developer.android.com/develop/connectivity/satellite/constrained-networks) — without it the OS never routes our traffic over a satellite connection even when it's the only option available. We want wardrive uploads and session auth to keep working (with adjusted pacing) when a user is off cellular/wifi coverage.

Actions Taken

• Manifest: declared PROPERTY_SATELLITE_DATA_OPTIMIZED opt-in and ACCESS_NETWORK_STATE permission
• Added MeshMapperNetworkService (native): registers a ConnectivityManager callback, reports constrained/satellite state over a new meshmapper/network_state EventChannel, wired into MainActivity's lifecycle
• Added NetworkStateService (Dart): singleton exposing the live constrained/satellite state to the rest of the app
• ApiQueueService: widen the wardrive upload batch interval from 15s to 60s while on a constrained network — fewer, larger batches instead of frequent small ones under high per-request latency
• ApiService.requestAuth: widen the session/API-slot acquisition timeout from 10s to 30s while on a constrained network

Tests Taken

• flutter analyze clean on all touched files
• Built and ran the debug APK on a physical Pixel 10 Pro XL (Android 17 / API 37), which exercises the real satellite-detection path (API 36+)
• Ran on the same device with a valid MESHMAPPER_API_KEY: BLE connect, #wardriving channel creation, auth + heartbeat (200, valid expires_at), zone check, RX logging with repeater SNR/path-length decode, and a queued wardrive upload (200) all completed successfully — confirms the connect -> slot-acquisition path works end-to-end
• Confirmed: the constrained-network-specific behavior itself (60s batch interval, 30s auth timeout)

Screenshots

Android OS

Setting under Sim > T-mobile > Satellite Connectivity

Meshmapper API connection over satellite

Notice the signal bars next to the battery indicates the session was created over a satellite connection.

screen-20260911-111102-1789150242832.mp4

[MrAlders0n]

Rebased onto current dev, preserved the stale-connection auth retry, and added coverage for constrained-network upload pacing and auth timeouts. All Flutter tests pass, and Android and web debug builds succeed.