Add shannc to accessibility component extensions watchlist

Signed-off-by: Shannon Chen <shannc@chromium.org>
Change-Id: I9fa066750a8e1e632eee4395d859aef4898319c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424627Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Anastasia Helfinstein <anastasi@google.com>
Commit-Queue: Shannon Chen <shannc@google.com>
Cr-Commit-Position: refs/heads/master@{#810409}

WATCHLISTS

@@ -2062,7 +2062,8 @@
                       'nektar+watch@chromium.org',
                       'sarakato+watch@chromium.org',
                       'yuzo+watch@chromium.org'],
-    'accessibility_component_extensions': ['anastasi+watch@google.com'],
+    'accessibility_component_extensions': ['anastasi+watch@google.com',
+                                           'shannc+watch@chromium.org'],
     'accessibility_minimal_core': ['aleventhal+watcha11y@chromium.org'],
     'add_to_homescreen': ['dominickn+watch-a2hs@chromium.org',
                           'hanxi+watch@chromium.org',