uses - permission
If you want your app to show users their display settings, you can achieve this with an intent:
Intent displaySettingsIntent = new Intent(Settings.ACTION_DISPLAY_SETTINGS); startActivity(displaySettingsIntent);
You can add the code to a button click, so when users click on that button, their phone's display settings will be shown to them, and they can pick whichever one they want (15 secs, 30 secs, 1 minute, etc).
Note: This code will switch from your app to the display settings page and to return to your app, users will need to press the back button.