Fix pool registered after interruption

mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbourMonitor.kt

@@ -71,12 +71,12 @@ class IpNeighbourMonitor private constructor() : Runnable {
                     }
                 }
                 monitor.waitFor()
-            } catch (ignore: InterruptedIOException) { }
                 if (monitor.exitValue() == 0) return@thread
                 Log.w(TAG, "Failed to set up monitor, switching to polling")
                 val pool = Executors.newScheduledThreadPool(1)
                 pool.scheduleAtFixedRate(this, 1, 1, TimeUnit.SECONDS)
                 this.pool = pool
+            } catch (ignore: InterruptedIOException) { }
         }
     }