Add accessibility related notification to notification center

ash/resources/vector_icons/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//ui/vector_icons/vector_icons.gni")
 
 aggregate_vector_icons("ash_vector_icons") {
   icon_directory = "."
 
   icons = [
@@ skipping 38 matching lines @@
     "network_badge_technology_lte.1x.icon",
     "network_badge_technology_lte.icon",
     "network_badge_technology_lte_advanced.1x.icon",
     "network_badge_technology_lte_advanced.icon",
     "network_badge_vpn.1x.icon",
     "network_badge_vpn.icon",
     "network_ethernet.1x.icon",
     "network_ethernet.icon",
     "network_vpn.1x.icon",
     "network_vpn.icon",
+    "notification_accessibility_braille.icon",
     "notification_display_error.icon",
     "notification_feedback_button.1x.icon",
     "notification_feedback_button.icon",
     "palette_action_capture_region.1x.icon",
     "palette_action_capture_region.icon",
     "palette_action_capture_screen.1x.icon",
     "palette_action_capture_screen.icon",
     "palette_action_create_note.1x.icon",
     "palette_action_create_note.icon",
     "palette_mode_laser_pointer.1x.icon",
@@ skipping 178 matching lines @@
 source_set("vector_icons") {
   sources = get_target_outputs(":ash_vector_icons")
 
   deps = [
     ":ash_vector_icons",
     "//base",
     "//skia",
     "//ui/gfx",
   ]
 }