Add myself to policy_templates.json watchlist

BUG=None
TEST=third_party/depot_tools/watchlists.py components/policy/resources/policy_templates.json

Change-Id: I8cc5c168f5d374c141456c02db3cc9e43de1eddc
Reviewed-on: https://chromium-review.googlesource.com/1114843Reviewed-by: Pavol Marko <pmarko@chromium.org>
Commit-Queue: Lutz Justen <ljusten@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571050}

WATCHLISTS

@@ -1311,6 +1311,9 @@
     'picture_in_picture': {
       'filepath': 'third_party/blink/renderer/modules/picture_in_picture/'
     },
+    'policy_templates': {
+      'filepath': 'components/policy/resources/policy_templates.json'
+    },
     'polymer': {
       'filepath': 'third_party/polymer/|'\
                   'third_party/web-animations-js/|'\
@@ -2235,6 +2238,7 @@
                     'raymes+watch@chromium.org',
                     'timloh+watch@chromium.org'],
     'picture_in_picture': ['beaufort.francois+pip@gmail.com'],
+    'policy_templates': ['ljusten+watch@chromium.org'],
     'polymer': ['michaelpg+watch-polymer@chromium.org'],
     'popup_blocker': ['csharrison+watch-popups@chromium.org'],
     'precache': ['wifiprefetch-reviews@google.com'],