[Desktop] Added strings for Notifications Settings Page

These strings are added for an additional option in notifications,
where the user can enable quiet notifications, or quiet notifications
can be auto-activated by the browser after several denies.

The strings are experimental, for two different UI flavours.

Bug: 986737
Change-Id: Ib6c6c0752ecd91b3f8fa34605ec10b052e56c25b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1919208Reviewed-by: Tommy Li <tommycli@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Commit-Queue: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715834}

chrome/app/settings_strings.grdp

@@ -3437,6 +3437,15 @@
   <message name="IDS_SETTINGS_SITE_SETTINGS_AUTOMATICALLY_BLOCKED_NOTIFICATIONS" desc="The label in notifications site settings -- a setting that is automatically set when the user declines notification permission prompts a few times.">
     Automatically blocked because you declined notifications a few times
   </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_SHOW_BLOCKED_NOTIFICATIONS_INDICATOR" desc="The label in notifications site settings -- a setting that enables showing a blocked indicator in the address bar when notifications are blocked for all sites. It can be set by the user or automatically set by Chrome when a user has denied notifications several times.">
+    Show an indicator in the address bar when notification are blocked
+  </message>
+    <message name="IDS_SETTINGS_SITE_SETTINGS_ENABLE_QUIET_NOTIFICATION_PROMPTS" desc="The label in notifications site settings -- a setting that enables showing a blocked indicator in the address bar instead of the prompt, when a site requests to send notifications. It can be set by the user or automatically set by Chrome when a user has denied notifications several times.">
+    Show prompts quietly
+  </message>
+  <message name="IDS_SETTINGS_SITE_SETTINGS_ENABLE_QUIET_NOTIFICATION_PROMPTS_DESCRIPTION" desc="The label description for 'quiet notifications' option in notifications site settings -- if a site requests to send notifications, the request will be blocked and a blocked indicator icon will appear in the address bar.">
+    Sites will be blocked from asking to show you notifications. If a site requests notifications, a blocked indicator will appear in the address bar.
+  </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_DONT_SHOW_IMAGES" desc="Label for the global 'Do not show any images' toggle (category default) in site settings.">
     Do not show any images
   </message>