Add service name constant for UI service.

ui/ozone/platform/drm/BUILD.gn

 # Copyright 2014 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("//build/config/linux/pkg_config.gni")
 import("//ui/ozone/ozone.gni")
 
 declare_args() {
   use_drm_atomic = false
 }
@@ skipping 109 matching lines @@
     "mus_thread_proxy.h",
     "ozone_platform_gbm.cc",
     "ozone_platform_gbm.h",
   ]
 
   deps = [
     "//base",
     "//ipc",
     "//mojo/common:common_base",
     "//services/service_manager/public/cpp:sources",
+    "//services/ui/public/interfaces:constants",
     "//skia",
     "//third_party/minigbm",
     "//ui/base",
     "//ui/display",
     "//ui/display/types",
     "//ui/display/util",
     "//ui/events",
     "//ui/events/devices",
     "//ui/events/ozone:events_ozone",
     "//ui/events/ozone:events_ozone_evdev",
@@ skipping 53 matching lines @@
     ":gbm",
     "//skia",
     "//testing/gtest",
     "//ui/gfx",
     "//ui/ozone:platform",
     "//ui/ozone/common",
   ]
 
   public_configs = [ ":libdrm" ]
 }