Reverted the code for the non-interactive audible tab notification

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 2122 matching lines @@
 
       <message name="IDS_VIDEO_CALL_NOTIFICATION_TEXT_2" desc="Text to be shown as a notification when a WebRTC video call is in progress.">
         Accessing video input
       </message>
       <message name="IDS_AUDIO_CALL_NOTIFICATION_TEXT_2" desc="Text to be shown as a notification when a WebRTC audio call is in progress">
         Accessing audio input
       </message>
       <message name="IDS_VIDEO_AUDIO_CALL_NOTIFICATION_TEXT_2" desc="Text to be shown as a notification when a WebRTC video and audio call is in progress">
         Accessing audio and video input
       </message>
-      <message name="IDS_AUDIO_PLAYBACK_NOTIFICATION_TEXT" desc="Text to be shown as a notification when a Chrome tab is playing audio">
-        Audio is playing
-      </message>
-      <message name="IDS_AUDIO_PLAYBACK_NOTIFICATION_TEXT_WITH_URL" desc="The notification will display this text for the user to identify the tab to return to when a Chrome tab is playing audio">
-        Audio is playing. Touch to return to <ph name="URL_OF_THE_CURRENT_TAB">%1$s<ex>https://apprtc.appspot.com</ex></ph>
-      </message>
       <message name="IDS_MEDIA_NOTIFICATION_LINK_TEXT" desc="Url of the current tab. The notification will display this text for the user to identify the tab to return to.">
         Touch to return to <ph name="URL_OF_THE_CURRENT_TAB">%1$s<ex>https://apprtc.appspot.com</ex></ph>
       </message>
       <message name="IDS_MEDIA_NOTIFICATION_TEXT_NO_LINK" desc="The notification will display this text for the user to identify the tab to return to when the link is unknown">
         Touch to return to the tab
       </message>
       <message name="IDS_NEW_TAB_INCOGNITO_HEADER" desc="Header shown when a user opens an incognito tab explaining incognito mode">
         You've gone incognito.
       </message>
       <message name="IDS_NEW_TAB_INCOGNITO_MESSAGE" desc="Message shown when a user opens an incognito tab explaining incognito mode">
@@ skipping 101 matching lines @@
       </message>
       <message name="IDS_HELP_CONTEXT_USAGE_REPORTS" translateable="false">
         send_crash_report
       </message>
       <message name="IDS_HELP_CONTEXT_SAD_TAB" translateable="false">
         mobile_awsnap
       </message>
     </messages>
   </release>
 </grit>