Android launch app show "Can modify system settings" dialog

As per marshmallow and onwards,the app is not allowed the permissions at the time of installation. Rather, the system will ask for required permission at the time in need(only one time if granted).In older versions(<23), apps were granted all required permissions at the time of installation.

Can modify system settings:

This is another new access setting. This is used to do things like read your current settings, turn on Wi-Fi, and change the screen brightness or volume. It's another permission that isn't in the permissions list.