Doesn't call doInBackground in ImageActivity

[khantthulinn]

Hi Developer,

Thanks for developing this library. It is useful and saved time. I just found out that on my S9, it doesn't call doInBackground in ImageActivity (at least 2 min long).

I guess and change things.

It is only okay after I change like this.
executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR)

instead of .execute Only.

https://stackoverflow.com/questions/29937556/asynctask-execute-or-executeonexecutor

I am not sure why it affect like this though. But please kindly debug.