Drupal 8: Dynamically set page title of view page display

change_view_page_title.includes.php

<?php

use Drupal\views\ViewExecutable;

/**
 * Implements hook_views_post_render().
 */
function my_module_views_post_render(ViewExecutable $view, &$output) {
	if ($view->id() == 'view_machine_name') {
    // Set title based on the user name of the current user profile.
      // Note: This view is only set to display on the /user path.
		$current_path = \Drupal::service('path.current')->getPath();
		$path_items = explode('/', $current_path);
		$user = User::load($path_items[2]);
		$view->setTitle($user->getAccountName());
	}
}