### Overview

Add `barrierDismissible`, `barrierColor` and `barrierLabel` parameters to  `showDatePicker`, `showTimePicker` and `showAboutDialog` which calls `showDialog` internally.
We can change these parameters with `showDialog` and Dialog widgets (like `DatePickerDialog`, `TimePickerDialog` or `AboutDialog`) directly. But, I think it is prefer to provide interfaces same as `showDialog` to keep application wide unified looks if it is used internally.

Fixes #130971