Update signin confirmation strings on Android and iOS

This CL updates 'Control how this works in Settings' UI strings.

BUG=704639

Review-Url: https://codereview.chromium.org/2849153003
Cr-Commit-Position: refs/heads/master@{#468627}

chrome/android/java/strings/android_chrome_strings.grd

@@ -2146,10 +2146,10 @@ To obtain new licenses, connect to the internet and play your downloaded content
         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

ios/chrome/app/strings/ios_strings.grd

@@ -141,7 +141,7 @@ locale.  The strings in this file are specific to iOS.
         Ok, Got it
       </message>
       <message name="IDS_IOS_ACCOUNT_CONSISTENCY_CONFIRMATION_OPEN_SETTINGS" desc="Description of how to configure sync and Google services on the sign-in confirmation screen. [Length: unlimited]">
-        Control how this works in <ph name="BEGIN_LINK">BEGIN_LINK</ph>Settings<ph name="END_LINK">END_LINK</ph>
+        Manage Chrome Sync and personalization in <ph name="BEGIN_LINK">BEGIN_LINK</ph>Settings<ph name="END_LINK">END_LINK</ph>
       </message>
       <message name="IDS_IOS_ACCOUNT_CONSISTENCY_CONFIRMATION_SCROLL_BUTTON" desc="Title of the button to scroll the confirmation screen when it is too small to show everything at once. [Length: 20m] [iOS only]">
         More