Add watchlist and more owners for chromeos/components/media_app_ui.

Bug: 996088
Change-Id: I4dcf297374afcb06abbd94b988ed39c0cad14967
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1828668
Auto-Submit: Trent Apted <tapted@chromium.org>
Commit-Queue: dstockwell <dstockwell@chromium.org>
Reviewed-by: Bugs Nash <bugsnash@chromium.org>
Reviewed-by: dstockwell <dstockwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701013}

WATCHLISTS

@@ -776,6 +776,10 @@
                   'chrome/browser/resources/chromeos/login/|'\
                   'ui/login/',
     },
+    'chromeos_media_app': {
+      'filepath': 'chromeos/components/media_app_ui/|'\
+                  'chromeos/resources/media_app_resources.grdp',
+    },
     'chromeos_net': {
       'filepath': 'ash/system/network/|'\
                   'chromeos/network/|'\
@@ -2235,6 +2239,7 @@
                        'alemate+watch@chromium.org',
                        'rsorokin+watch@chromium.org',
                        'tbarzic+watch@chromium.org'],
+    'chromeos_media_app': ['cros-essential-apps-dev+watch@chromium.org'],
     'chromeos_net': ['azeemarshad+watch-network@chromium.org',
                      'benchan+watch-network@chromium.org',
                      'ejcaruso+watch-network@chromium.org',

chromeos/components/media_app_ui/OWNERS

 tapted@chromium.org
+dstockwell@chromium.org
+bugsnash@chromium.org
+
+# TEAM: cros-essential-apps-dev@chromium.org
+# COMPONENT: Platform>Apps>PhotoEditor
+# Internal Component: b/components/562866