App 2.43.5: update checks log what happens

Each check writes down the networks Android sees, the server's name lookup,
how a failure happened and how many reports wait, and on a failure whether
the internet answers at all, to tell a SIM without data from a server that is
down. The report goes to a USB stick and, once online, the server. No address
or token is written. Tried on the emulator. Not tried on the car.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

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

@@ -85,6 +85,12 @@ final class LogOutbox {
         return true;
     }
 
+    /** Removes what waits under names starting with [prefix]. */
+    static synchronized void dropWaiting(Context context, String prefix) {
+        File dir = new File(context.getFilesDir(), DIR);
+        for (String name : waiting(dir)) if (name.startsWith(prefix)) new File(dir, name).delete();
+    }
+
     /** Sends what waits, unless the last attempt failed less than {@link #RETRY_MS} ago. Blocking:
      *  call it off the main thread. */
     static void sendIfDue(Context context) {