Android Kills Background Services in Xiaomi, Huawe

I need to make my service unstoppable. I tried to return START_STICKY on start command, it works well on emulator but, when remove the app from task manager on my device (Xiaomi mi5s, Android 7), it doesn't create itself again.

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    return START_STICKY;
}

Edit: I gave Auto Start permission and disabled battery protection rules for the app.

Edit: Also I tried to use foreground service. However, it is being killed too..

   @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);

        Intent notificationIntent = new Intent(getApplicationContext(), StartActivity.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        PendingIntent contentPendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

        Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setContentTitle(getResources().getString(R.string.app_name))
                .setTicker(getResources().getString(R.string.app_name))
                .setContentText("Hello!")
                .setSmallIcon(R.mipmap.ic_launcher2)
                .setContentIntent(contentPendingIntent)
                .setOngoing(true)
                .build();
        notification.flags = notification.flags | Notification.FLAG_NO_CLEAR;
        startForeground(1, notification);

        return START_NOT_STICKY;
    }


---Activity
       ContextCompat.startForegroundService(this, new Intent(this, LockerService.class));

Logcat

2018-10-31 21:24:22.143 2168-2168/? D/wpa_supplicant: wlan0: Control interface command 'SIGNAL_POLL'
2018-10-31 21:24:22.555 1513-3093/? D/ProcessManager: update DY:[com.touchtype.swiftkey, com.miui.voip]
2018-10-31 21:24:22.560 1513-3093/? D/ProcessManager: remove task: TaskRecord{36f7d55 #495 A=me.ibrahimsn.applock U=0 StackId=1 sz=1}
2018-10-31 21:24:22.607 3103-3296/? I/WtEventController: dispatchSysInfoEvent AM_NEW_INTENT componentName:com.miui.home/.launcher.Launcher
2018-10-31 21:24:22.610 1513-9074/? D/ActivityTrigger: ActivityTrigger activityPauseTrigger 
2018-10-31 21:24:22.624 1513-9074/? I/Timeline: Timeline: App_transition_ready time:44879245
2018-10-31 21:24:22.626 1513-1604/? D/ActivityTrigger: ActivityTrigger activityStopTrigger 
2018-10-31 21:24:22.628 1513-1620/? I/Timeline: Timeline: App_transition_ready time:44879248
2018-10-31 21:24:22.630 1513-12578/? I/Timeline: Timeline: App_transition_ready time:44879251
2018-10-31 21:24:22.633 3185-3185/? D/SearchCardView: onVisibilityChanged: 0
2018-10-31 21:24:22.635 3185-3831/? I/RenderThread: RenderThread resumed
2018-10-31 21:24:22.635 3185-3831/? D/ScreenElementRoot: resume
2018-10-31 21:24:22.639 3185-3831/? I/NotifierManager: onRegister: miui.maml.NotifierManager$MultiBroadcastNotifier@46712e7
2018-10-31 21:24:22.646 1513-3093/? I/Timeline: Timeline: App_transition_ready time:44879267
2018-10-31 21:24:22.680 1513-1620/? I/Timeline: Timeline: App_transition_ready time:44879301
2018-10-31 21:24:22.686 2134-2134/? V/PhoneStatusBarPolicy: updateManagedProfile mManagedProfileFocused: false mManagedProfileInQuietMode: false mKeyguardVisible: false mCurrentUserId:0 mCurrentProfileId:0 mSecondSpaceStatusIconVisible: true showIcon:false
2018-10-31 21:24:22.689 1513-10970/? D/GraphicsStats: Buffer count: 4
2018-10-31 21:24:22.694 2134-2134/? D/StatusBar: onNotificationRemoved:  Key: 0|me.ibrahimsn.applock|1|null|10637

How can i do that?