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/res/drawable/ic_tab_server.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Arrow into a tray: the Server tab (where the telemetry goes). Tinted by
+     @color/nav_tab_foreground. -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:strokeColor="#FFFFFFFF"
+        android:strokeWidth="2"
+        android:strokeLineCap="round"
+        android:strokeLineJoin="round"
+        android:fillColor="#00000000"
+        android:pathData="M4,14V19H20V14" />
+    <path
+        android:strokeColor="#FFFFFFFF"
+        android:strokeWidth="2"
+        android:strokeLineCap="round"
+        android:strokeLineJoin="round"
+        android:fillColor="#00000000"
+        android:pathData="M12,3V13M8,7L12,3L16,7" />
+</vector>