temporary fix for building

app/src/main/java/io/nekohasekai/sfa/bg/ProxyService.kt

@@ -2,6 +2,7 @@ package io.nekohasekai.sfa.bg
 
 import android.app.Service
 import android.content.Intent
+import io.nekohasekai.libbox.NeighborUpdateListener
 import io.nekohasekai.libbox.Notification
 
 class ProxyService :
@@ -14,6 +15,12 @@ class ProxyService :
     override fun onBind(intent: Intent) = service.onBind()
 
     override fun onDestroy() = service.onDestroy()
+    override fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
+
+    }
 
     override fun sendNotification(notification: Notification) = service.sendNotification(notification)
+    override fun startNeighborMonitor(listener: NeighborUpdateListener?) {
+        
+    }
 }

app/src/main/java/io/nekohasekai/sfa/bg/VPNService.kt

@@ -7,6 +7,7 @@ import android.net.VpnService
 import android.os.Build
 import android.os.IBinder
 import android.util.Log
+import io.nekohasekai.libbox.NeighborUpdateListener
 import io.nekohasekai.libbox.Notification
 import io.nekohasekai.libbox.TunOptions
 import io.nekohasekai.sfa.database.Settings
@@ -51,6 +52,9 @@ class VPNService :
         protect(fd)
     }
 
+    override fun closeNeighborMonitor(listener: NeighborUpdateListener?) {
+    }
+
     var systemProxyAvailable = false
     var systemProxyEnabled = false
 
@@ -182,4 +186,6 @@ class VPNService :
     }
 
     override fun sendNotification(notification: Notification) = service.sendNotification(notification)
+    override fun startNeighborMonitor(listener: NeighborUpdateListener?) {
+    }
 }