Simple application to add up to 3 quick settings tiles to the quick settings layout.
The app makes use of the accessibility service to provide quick settings tiles to perform global actions: screenshot (API level 28), sleep (API level 28) and system power dialog (API level 21).
System power dialog (GLOBAL_ACTION_POWER_DIALOG) has been added in API level 21 (https://developer.android.com/reference/android/accessibilityservice/AccessibilityService#GLOBAL_ACTION_POWER_DIALOG).
Sleep (GLOBAL_ACTION_LOCK_SCREEN) has been added in API level 28 (https://developer.android.com/reference/android/accessibilityservice/AccessibilityService#GLOBAL_ACTION_LOCK_SCREEN).
Screenshot (GLOBAL_ACTION_TAKE_SCREENSHOT) has been added in API level 28 (https://developer.android.com/reference/android/accessibilityservice/AccessibilityService#GLOBAL_ACTION_TAKE_SCREENSHOT).
