App 2.15.0: queued live data survives restarts

Unsent live samples were kept in memory only, so a reboot or a killed
process during a dead spot lost them. The queue is now saved to
files/telemetry_queue.json with AtomicFile, at most every 5 minutes and
only after a change (the flash is not written every 15 s), and at once
when the service stops; it is restored, oldest first and within the
2000-sample cap, when the service starts. A damaged file restores
nothing rather than failing. Tested on the emulator across a reboot.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

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

@@ -141,7 +141,10 @@ public class AbrpUploadService extends Service {
         running = false;
         prefs.edit().putBoolean("service_running", false).apply();
         if (scheduler != null) scheduler.shutdownNow();
-        if (telemetryUploader != null) telemetryUploader.stop();
+        if (telemetryUploader != null) {
+            telemetryUploader.persist(); // what is still queued survives the restart
+            telemetryUploader.stop();
+        }
         if (steeringKeys != null) steeringKeys.unregister();
         Log.i(TAG, "Service stopped");
     }