App 2.3.0: Server tab, live telemetry to the car server

- New Server tab: server URL, ingest token and installation id, with
  Save, Test connection (health, then a read-only token check) and the
  config-file import that upstream removed (app folder / USB stick first,
  document picker as fallback). Settings are kept encrypted and read on
  every use, so the service picks up a change without a restart. Each
  installation generates its own id; the inherited upstream UUID and
  the baked-in CONSUMPTION_API_* build fields are gone.
- Live telemetry restored from before ea8032a (TelemetryPayload,
  UploadCadence, UploadSettings, GPS) and sent in batches to
  POST /v1/telemetry instead of ABRP; the server forwards to ABRP. Adds
  ext_temp, voltage and current. Unsent samples queue in memory (about
  8 h) while offline.
- Upload tab: the live-telemetry switch and cadence controls work again;
  the dead service and autostart switches are removed.
- Manifest: location permissions and foreground service types.
- Unit tests compile again: 114 (stable) / 136 (unstable) pass. Tests
  for the deleted AbrpApi and HeadUnitWeather removed; new tests for
  ServerConfig and TelemetryQueue. Lint passes.

Not yet tried on the car.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/src/main/java/com/evsuite/abrp/UploadSettings.java

@@ -1,14 +1,79 @@
 package com.evsuite.abrp;
 
+import android.content.SharedPreferences;
+
 /**
- * Placeholder — the service is always-on and samples on a fixed 15-second scheduler, so
- * there is no user-configurable upload policy left. Kept as an empty shell so any stray
- * references compile during the ABRP removal; will be deleted once all callers are gone.
+ * User-configurable upload policy.
+ *
+ * Defaults are deliberately conservative. The head unit is awake whenever the car is on,
+ * and both the upload tick and the GPS subscription cost power the whole time, so the
+ * default cadence is the slowest one that still keeps an ABRP route plan usable.
  */
 final class UploadSettings {
 
-    static final String KEY_AUTOSTART = "autostart";
-    static final boolean DEFAULT_AUTOSTART = true;
+    static final String KEY_INTERVAL_SEC    = "upload_interval_sec";
+    static final String KEY_BOOST_LOW_SOC   = "boost_low_soc";
+    static final String KEY_LOW_SOC_PERCENT = "low_soc_percent";
+    static final String KEY_AUTOSTART       = "autostart";
+    static final String KEY_ABRP_UPLOAD_ENABLED = "abrp_upload_enabled";
 
-    private UploadSettings() { }
+    /**
+     * On by default: an ABRP plan is only useful if it is fed from the moment the drive
+     * starts, and nobody opens this app before setting off. Kept as a switch because a
+     * service that starts itself must also be switchable off.
+     */
+    static final boolean DEFAULT_AUTOSTART = true;
+    static final boolean DEFAULT_ABRP_UPLOAD_ENABLED = true;
+
+    /**
+     * Default cadence while driving. 60 s is roughly 1.5 km between points at motorway
+     * speed, which ABRP can still track; going much slower makes the live plan lag
+     * reality. Parked and idle backs off far further on its own — see UploadCadence.
+     */
+    static final int DEFAULT_INTERVAL_SEC = 60;
+
+    /** Offered in the UI. Kept short so the list stays a single glance on a car screen. */
+    static final int[] INTERVAL_CHOICES_SEC = { 15, 30, 60, 120, 300 };
+
+    static final boolean DEFAULT_BOOST_LOW_SOC = true;
+
+    /** Below this, range planning gets tight and ABRP needs a finer SOC curve. */
+    static final int DEFAULT_LOW_SOC_PERCENT = 20;
+
+    /** Cadence used while SOC is low and the boost is enabled. */
+    static final int BOOSTED_INTERVAL_SEC = 15;
+
+    final int intervalSec;
+    final boolean boostLowSoc;
+    final int lowSocPercent;
+    final boolean abrpUploadEnabled;
+
+    UploadSettings(int intervalSec, boolean boostLowSoc, int lowSocPercent) {
+        this(intervalSec, boostLowSoc, lowSocPercent, DEFAULT_ABRP_UPLOAD_ENABLED);
+    }
+
+    UploadSettings(int intervalSec, boolean boostLowSoc, int lowSocPercent,
+                   boolean abrpUploadEnabled) {
+        this.intervalSec = intervalSec;
+        this.boostLowSoc = boostLowSoc;
+        this.lowSocPercent = lowSocPercent;
+        this.abrpUploadEnabled = abrpUploadEnabled;
+    }
+
+    static UploadSettings from(SharedPreferences prefs) {
+        return new UploadSettings(
+                prefs.getInt(KEY_INTERVAL_SEC, DEFAULT_INTERVAL_SEC),
+                prefs.getBoolean(KEY_BOOST_LOW_SOC, DEFAULT_BOOST_LOW_SOC),
+                prefs.getInt(KEY_LOW_SOC_PERCENT, DEFAULT_LOW_SOC_PERCENT),
+                prefs.getBoolean(KEY_ABRP_UPLOAD_ENABLED, DEFAULT_ABRP_UPLOAD_ENABLED));
+    }
+
+    static UploadSettings defaults() {
+        return new UploadSettings(
+                DEFAULT_INTERVAL_SEC, DEFAULT_BOOST_LOW_SOC, DEFAULT_LOW_SOC_PERCENT);
+    }
+
+    long intervalMs() {
+        return intervalSec * 1000L;
+    }
 }