Update signin confirmation strings on Android and iOS

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 2128 matching lines @@
       <message name="IDS_SIGNIN_OPEN_ADD_GOOGLE_ACCOUNT_PAGE_FAILED" desc="Message for opening add Google Account page in device's Settings app failed">
         Add a Google Account from the Accounts page in your device’s Settings app.
       </message>
       <message name="IDS_SIGNIN_OPEN_SETTINGS_ACCOUNTS" desc="Text for button to open Accounts page in device's Settings app">
         Open settings
       </message>
       <message name="IDS_SIGNIN_HI_NAME" desc="Title welcoming the user by their name after they have signed in.">
         Hi, <ph name="FULL_NAME">%1$s<ex>John Smith</ex></ph>
       </message>
       <message name="IDS_SIGNIN_SIGNED_IN_SETTINGS_DESCRIPTION_CHILD_ACCOUNT" desc="Label of the section containing the link to go to the settings page, when signing in to a child account.">
-        You and your parents can control how this works in <ph name="BEGIN_LINK1">&lt;LINK1&gt;</ph>Settings<ph name="END_LINK1">&lt;/LINK1&gt;</ph>
+        You and your parents can manage Chrome Sync and personalization in <ph name="BEGIN_LINK1">&lt;LINK1&gt;</ph>Settings<ph name="END_LINK1">&lt;/LINK1&gt;</ph>
       </message>
       <message name="IDS_SIGNIN_SIGNED_IN_SETTINGS_DESCRIPTION" desc="Label of the section containing the link to go to the settings page.">
-        Control how this works in <ph name="BEGIN_LINK1">&lt;LINK1&gt;</ph>Settings<ph name="END_LINK1">&lt;/LINK1&gt;</ph>
+        Manage Chrome Sync and personalization in <ph name="BEGIN_LINK1">&lt;LINK1&gt;</ph>Settings<ph name="END_LINK1">&lt;/LINK1&gt;</ph>
       </message>
       <message name="IDS_SIGNIN_GMS_UPDATING" desc="Message notifying user that Google Play Services is still updating.">
         Waiting for Google Play Services to finish updating
       </message>
 
       <!-- External Navigation Strings -->
       <message name="IDS_EXTERNAL_APP_LEAVE_INCOGNITO_WARNING" desc="Alert dialog text warning the user (who is currently in incognito mode) that the site they are currently using is going to share data with an external application.">
         This site is about to share information with an app outside of incognito mode.
       </message>
       <message name="IDS_EXTERNAL_APP_LEAVE_INCOGNITO_WARNING_TITLE" desc="Title for dialog asking if the user wants to leave incognito mode. [CHAR-LIMIT=32]">
@@ skipping 811 matching lines @@
         Remove and recreate this shortcut
       </message>
 
       <!-- Chrome Home -->
       <message name="IDS_BOTTOM_SHEET_HELP_BUBBLE_MESSAGE" desc="Text displayed in a help bubble above the bottom navigation sheet prompting users to pull the sheet up to see their bookmarks and other content.">
         Pull up to see bookmarks and more
       </message>
     </messages>
   </release>
 </grit>