Emoji: Print the emoji support shim in wp-admin, too.

See #31701.


Built from https://develop.svn.wordpress.org/trunk@31877


git-svn-id: http://core.svn.wordpress.org/trunk@31856 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin-header.php

@@ -50,6 +50,9 @@ _wp_admin_html_begin();
 <title><?php echo $admin_title; ?></title>
 <?php
 
+print_emoji_detection_script();
+print_emoji_styles();
+
 wp_enqueue_style( 'colors' );
 wp_enqueue_style( 'ie' );
 wp_enqueue_script('utils');