Added string "Always allowed" for Android content settings.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 594 matching lines @@
       </message>
       <message name="IDS_WEBSITE_SETTINGS_CATEGORY_ALLOWED" desc="Summary text explaining that a permission is allowed, e.g. JavaScript: allowed.">
         Allowed
       </message>
       <message name="IDS_WEBSITE_SETTINGS_CATEGORY_BLOCKED" desc="Summary text explaining that a permission is blocked, e.g. JavaScript: blocked.">
         Blocked
       </message>
       <message name="IDS_WEBSITE_SETTINGS_CATEGORY_ALLOWED_EXCEPT_THIRD_PARTY" desc="Summary text for when only third-party cookies are blocked.">
         Allowed, except third-party
       </message>
+      <message name="IDS_WEBSITE_SETTINGS_CATEGORY_ALWAYS_ALLOWED" desc="Summary text explaining that a permission is allowed, and cannot be changed by the user, e.g. JavaScript: always allowed.">
+        Always allowed
+      </message>
       <message name="IDS_WEBSITE_SETTINGS_CATEGORY_ASK" desc="Summary text explaining that Chrome will ask the user before allowing a site to use a certain permission, e.g. JavaScript: ask first.">
         Ask first
       </message>
       <message name="IDS_WEBSITE_SETTINGS_BLOCKED_GROUP_HEADING" desc="The heading for a list of websites that have been blocked from using a particular permission, e.g. blocked from accessing the user's location.">
         Blocked
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ALLOWED_GROUP_HEADING" desc="The heading for a list of websites that have been allowed to use a particular permission, e.g. allowed to access a user's location.">
         Allowed
       </message>
       <message name="IDS_WEBSITE_SETTINGS_EXCEPTIONS_GROUP_HEADING" desc="The heading for a list of websites that have been granted an exception to access a particular permission, e.g. to access the user's location.">
@@ skipping 1784 matching lines @@
       <!-- Migration strings -->
       <message name="IDS_TAB_SWITCHER_CALLOUT_HEADER" desc="Header for the Tab Switcher callout.">
         Quickly switch tabs
       </message>
       <message name="IDS_TAB_SWITCHER_CALLOUT_BODY" desc="Indicates that clicking the tab switcher button gives you quick access to your tabs.">
         Tap this button for quick access to your tabs.
       </message>
     </messages>
   </release>
 </grit>