Add audio_mixer to WATCHLISTS

WATCHLISTS

 # Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # Inspired by chromium.org:
 # http://dev.chromium.org/developers/contributing-code/watchlists
@@ skipping 50 matching lines @@
     },
     'audio_device': {
       'filepath': 'webrtc/modules/audio_device/.*',
     },
     'audio_coding': {
       'filepath': 'webrtc/modules/audio_coding/.*',
     },
     'neteq': {
       'filepath': 'webrtc/modules/audio_coding/neteq/.*',
     },
+    'audio_mixer': {
+      'filepath': 'webrtc/modules/audio_mixer/.*',
+    },
     'audio_processing': {
       'filepath': 'webrtc/modules/audio_processing/.*',
     },
     'video_coding': {
       'filepath': 'webrtc/modules/video_coding/.*',
     },
     'video_processing': {
       'filepath': 'webrtc/modules/video_processing/.*',
     },
     'bitrate_controller': {
@@ skipping 60 matching lines @@
                      'sdk-team@agora.io'],
     'audio_coding': ['audio-team@agora.io',
                      'henrik.lundin@webrtc.org',
                      'kwiberg@webrtc.org',
                      'minyue@webrtc.org',
                      'peah@webrtc.org',
                      'tina.legrand@webrtc.org'],
     'neteq': ['audio-team@agora.io',
               'henrik.lundin@webrtc.org',
               'minyue@webrtc.org'],
+    'audio_mixer': ['henrik.lundin@webrtc.org'],
     'audio_processing': ['aluebs@webrtc.org',
                          'andrew@webrtc.org',
                          'audio-team@agora.io',
                          'bjornv@webrtc.org',
                          'henrik.lundin@webrtc.org',
                          'kwiberg@webrtc.org',
                          'minyue@webrtc.org',
                          'peah@webrtc.org',
                          'solenberg@webrtc.org'],
     'video_coding': ['mflodman@webrtc.org',
@@ skipping 16 matching lines @@
                  'stefan@webrtc.org',
                  'danilchap@webrtc.org',
                  'zhuangzesen@agora.io'],
     'system_wrappers': ['fengyue@agora.io',
                         'henrika@webrtc.org',
                         'mflodman@webrtc.org',
                         'peah@webrtc.org',
                         'zhengzhonghou@agora.io'],
   },
 }