AutoTools Possible solution to the error "Can't change setting on this device"

I know there's a thread here about this same error, but apparently it was something exclusive to Samsung devices. So, to avoid mixing possibly unrelated issues, here is what I could find out regarding a possible solution:

I was trying to use AutoTools to change my device's locale (Oneplus 3T) through Tasker but I kept getting the same error:

And here is the task:

The device is rooted and running Android 7.0 (OxygenOS v.4.0.3 stock). AutoTools was granted the WRITE_SETTINGS permission via adb.
Eventually I found out an app that could successfully change the locale via adb shell (ADB Change Language) and required the CHANGE_CONFIGURATION permission. I tried to grant the same permission to AutoTools but got this:

So if you change AutoTools to request the CHANGE_CONFIGURATION permission the locale change (and maybe other settings too) will probably work.

 

Update: According to the dev of ADB Change Language, his app is using the method outlined on http://stackoverflow.com/questions/2900023/change-language-programmatically-in-android.

 

Just tested this version (1.0.8b.bf) and unfortunately the error persists with exactly the same error message.

 

Yes, the CHANGE_CONFIGURATION permission was successfully granted through ADB. Maybe the secret is really on that stackoverflow thread I linked above.

 

I don't know, I just asked the developer of ADB Change Language (ohtonen.juuso@gmail.com) how he did it and he directed me to that thread.

 

I can confirm it works on my Oneplus 3T running Android 7.1.1, thank you!