fix(aprs): crash when enabling APRS with callsign set (foreground service type)

Root cause: user reported crash on enabling APRS with a callsign set
(empty callsign worked because the service stops early and never
reaches startForeground). Android 14+ requires the service to declare
foregroundServiceType when startForeground passes a type; the service
had none -> process died on toggle.

- Manifest: add android:foregroundServiceType="dataSync"
- AprsCard: use startForegroundService() for start/report actions
  (Android 8+ standard for foreground services)
- AprsForegroundService: try-catch around startForeground, fallback
  stopSelf instead of killing the process
- AprsReporter: passcode "-1" (APRSdroid "no auth" convention) also
  auto-computes from callsign
- Merged upstream 418a05e3 (zh wording fix, no conflicts)
Verified: compileDebugKotlin all modules BUILD SUCCESSFUL,
check_strings 9 files OK.

app/src/main/AndroidManifest.xml

@@ -50,6 +50,7 @@
 
             <service
             android:name="com.rtbishop.look4sat.app.AprsForegroundService"
-            android:exported="false" />
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
     </application>
 </manifest>