fix(gpsrelaysentinel): 修复MainActivity访问MainService常量的权限问题

- 将PREF_NAME和KEY_SERVICE_ENABLED字段从private改为包内可见
- 允许MainActivity访问SP相关常量以设置服务状态标记
- 修复编译错误：KEY_SERVICE_ENABLED has private access

gpsrelaysentinel/build.properties

@@ -1,8 +1,8 @@
 #Created by .winboll/winboll_app_build.gradle
-#Wed May 06 20:58:30 CST 2026
+#Thu May 07 02:57:52 CST 2026
 stageCount=27
 libraryProject=
 baseVersion=15.11
 publishVersion=15.11.26
-buildCount=26
+buildCount=30
 baseBetaVersion=15.11.27

gpsrelaysentinel/src/main/java/cc/winboll/studio/gpsrelaysentinel/MainService.java

@@ -26,8 +26,8 @@ public class MainService extends Service {
     private NotificationCompat.Builder mNotificationBuilder;
     private static final String CHANNEL_ID = "gps_relay_channel";
     private static final int NOTIFICATION_ID = 1;
-    private static final String PREF_NAME = "gps_relay_service_prefs";
-    private static final String KEY_SERVICE_ENABLED = "service_enabled";
+    static final String PREF_NAME = "gps_relay_service_prefs";
+    static final String KEY_SERVICE_ENABLED = "service_enabled";
     private int mGpsCount = 0;
 
     @Override