fix(aprs): settings crash from format arg type mismatch + service class name

- prefs_aprs_summary uses %2$d but AprsCard passed port.toString()
  (String) -> String.format threw IllegalFormatConversionException
  on every Settings screen open (crash). Pass Int now.
- Manifest service name was ".AprsForegroundService" (resolves under
  applicationId) but the class lives in com.rtbishop.look4sat.app ->
  ClassNotFoundException when toggling. Use full class name.
Verified: :feature:settings:compileDebugKotlin + :app:compileDebugKotlin
BUILD SUCCESSFUL.

app/src/main/AndroidManifest.xml

@@ -49,7 +49,7 @@
             android:value="com.rtbishop.look4sat.bg7nta" />
 
             <service
-            android:name=".AprsForegroundService"
+            android:name="com.rtbishop.look4sat.app.AprsForegroundService"
             android:exported="false" />
     </application>
 </manifest>