APK抓包>从频道1开始依次抓取, 修复抓包等待时间停止任务，重新开始后之前的任务仍在执行问题

#BYLSERVER-1693

app/src/main/java/com/duolebo/blyrobot/MainActivity.kt

@@ -89,6 +89,7 @@ class MainActivity : AppCompatActivity(), IAppBaseCallback {
 
     private fun start() {
         startBtn.isEnabled = false
+        stopBtn.isEnabled = true
         if (TaskManager.instance.tasks.size > 0) {
             startRobot()
         }