Hotword Audio Verification App: Adds to hotwordPrivate API

chrome/common/extensions/api/schemas.gypi

 # 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.
 
 {
   'sources': [
     '<@(schema_files)',
   ],
   'variables': {
     # These duplicate other lists and are the only ones used on Android. They
@@ skipping 40 matching lines @@
       'file_browser_private.idl',
       'file_browser_private_internal.idl',
       'file_system.idl',
       'file_system_provider.idl',
       'file_system_provider_internal.idl',
       'font_settings.json',
       'gcd_private.idl',
       'gcm.json',
       'hangouts_private.idl',
       'history.json',
+      'hotword_audio_verification_private.idl',
       'hotword_private.idl',
       'i18n.json',
       'identity.idl',
       'identity_private.idl',
       'idle.json',
       'image_writer_private.idl',
       'input_ime.json',
       'location.idl',
       'management.json',
       'manifest_types.json',
@@ skipping 106 matching lines @@
         'schema_files': [
           '<@(webrtc_schema_files)',
         ],
       }],
     ],
     'cc_dir': 'chrome/common/extensions/api',
     'root_namespace': 'extensions::api::%(namespace)s',
     'impl_dir_': 'chrome/browser/extensions/api',
   },
 }