[Merge M56] arc: Add (beta) to the title of Arc OptIn notification.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 6340 matching lines @@
   <message name="IDS_ARC_PLAYSTORE_ICON_TITLE_BETA" desc="The Play Store icon title with the beta label in the launcher.">
     Play Store (beta)
   </message>
   <message name="IDS_OPTIONS_ARC_ENABLE" desc="Label for the checkbox that enables Google Play Store apps.">
     Enable Google Play Store on your Chromebook.
   </message>
   <message name="IDS_OPTIONS_ARC_MANAGE_APPS" desc="Label for launching  Android apps settings.">
     Manage your Android <ph name="BEGIN_LINK">&lt;a is="action-link" id="android-apps-settings-link" role="link"&gt;</ph>preferences<ph name="END_LINK">&lt;/a&gt;</ph>.
   </message>
   <message name="IDS_ARC_NOTIFICATION_TITLE" desc="Title of the first-run notification that enables Android apps.">
-    Google Play Store
+    Google Play Store (beta)
   </message>
   <message name="IDS_ARC_NOTIFICATION_MESSAGE" desc="Description message of the first-run notification that enables Android apps.">
     Over a million apps and games now available on your <ph name="DEVICE_TYPE">$1<ex>Chromebook</ex></ph>.
   </message>
   <message name="IDS_ARC_OPEN_PLAY_STORE_NOTIFICATION_BUTTON" desc="Label for the button in the first-run notification that enables Android apps.">
     Open Play Store
   </message>
   <message name="IDS_ARC_CANCEL_NOTIFICATION_BUTTON" desc="Label for the button in the first-run notification that cancel running Android apps.">
     Cancel
   </message>
@@ skipping 200 matching lines @@
   <message name="IDS_PRINT_JOB_NOTIFICATION_PAUSE_BUTTON" desc="Text on the button for the user to pause the current print job.">
     Pause printing
   </message>
   <message name="IDS_PRINT_JOB_NOTIFICATION_RESUME_BUTTON" desc="Text on the button for the user to resume the current print job.">
     Resume printing
   </message>
   <message name="IDS_PRINT_JOB_NOTIFICATION_GET_HELP_BUTTON" desc="Text on the button for the user to get help about the current print job.">
     Get help
   </message>
 </grit-part>