fix crash on proxy only mode

service/src/main/java/com/github/kr328/clash/service/ClashService.kt

@@ -12,6 +12,7 @@ import com.github.kr328.clash.core.Clash
 import com.github.kr328.clash.core.event.*
 import com.github.kr328.clash.core.utils.Log
 import java.util.concurrent.Executors
+import kotlin.concurrent.thread
 
 class ClashService : Service(), IClashEventObserver {
     private val executor = Executors.newSingleThreadExecutor()
@@ -102,6 +103,9 @@ class ClashService : Service(), IClashEventObserver {
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         super.onStartCommand(intent, flags, startId)
 
+        notification.setVpn(false)
+        notification.show()
+
         instance.clash.start()
 
         return START_NOT_STICKY