Improve clarity of Physical Web onboarding interstitial message

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 2335 matching lines @@
       </message>
       <message name="IDS_PHYSICAL_WEB_PREF_DESCRIPTION" desc="Description for Physical Web preference">
         Discover web pages sent by nearby objects. Chrome gathers web pages associated with objects around you, sends them anonymously to a Google service to find the ones most useful to you, then displays them.
 
 You must have Bluetooth and Location turned on in order to use the Physical Web.
       </message>
       <message name="IDS_PHYSICAL_WEB_OPTIN_TITLE" desc="The title for a dialog inviting the user to opt-in to the Physical Web.">
         Chrome + Physical Web
       </message>
       <message name="IDS_PHYSICAL_WEB_OPTIN_DESCRIPTION" desc="Description of the Physical Web displayed in the opt-in dialog">
-        Chrome can now find and show you nearby web pages using Bluetooth.
+        Devices nearby you are broadcasting web pages over Bluetooth. Chrome will scan for pages and display them when you wake up your device. These pages will go through a Google service to improve the quality of page results.
 
-Chrome will scan for nearby pages when your device is unlocked. These pages will go through a Google service to improve the quality of page results.
-
-You can control the Physical Web in Chrome privacy settings.
+You can control the Physical Web in Chrome Settings.
       </message>
       <message name="IDS_PHYSICAL_WEB_LIST_URLS_ACTIVITY_TITLE" desc="The title for a dialog that shows a list of URLs broadcasted from nearby devices.">
         The Physical Web
       </message>
       <message name="IDS_PHYSICAL_WEB_NOTIFICATION_TITLE" desc="The message displayed in a notification when there are nearby URLs.">
         Physical Web pages nearby
       </message>
       <message name="IDS_PHYSICAL_WEB_OPTIN_NOTIFICATION_TITLE" desc="The first line in a notification message informing the user there are nearby devices broadcasting URLs and Chrome can be used to browse the list of URLs.">
         Physical Web pages are nearby
       </message>
@@ skipping 33 matching lines @@
       </message>
       <message name="IDS_USB_CHOOSER_DIALOG_CONNECT_BUTTON_TEXT" desc="The text that is shown on the connect button in the USB chooser dialog.">
         Connect
       </message>
       <message name="IDS_USB_CHOOSER_DIALOG_FOOTNOTE_TEXT" desc="This text is shown at the bottom of the USB chooser dialog with a link to part of its text.">
         Not seeing your device? <ph name="BEGIN_LINK">&lt;link&gt;</ph>Get help<ph name="END_LINK">&lt;/link&gt;</ph>
       </message>
     </messages>
   </release>
 </grit>