Add watchlist for webrtc/media + add solenberg@

WATCHLISTS

Index: WATCHLISTS
diff --git a/WATCHLISTS b/WATCHLISTS
index cf6caa282e5f6dea78061147ed76a2749b2bc429..3742e7e4e3c7aaff44e39214c6fc5a5d7fb81663 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -38,6 +38,9 @@
     'call': {
       'filepath': 'webrtc/call/.*',
     },
+    'media': {
+      'filepath': 'webrtc/media/.*',
+    },
     'video': {
       'filepath': 'webrtc/video/.*',
     },
@@ -111,10 +114,10 @@
              'pbos@webrtc.org',
              'solenberg@webrtc.org',
              'stefan@webrtc.org'],
+    'media': [solenberg@webrtc.org],
     'video': ['mflodman@webrtc.org',
               'pbos@webrtc.org',
               'perkj@webrtc.org',
-              'solenberg@webrtc.org',
               'stefan@webrtc.org',
               'video-team@agora.io',
               'yujie.mao@webrtc.org',