Update voice interaction OOBE with new UX spec

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Chrome OS-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 6075 matching lines @@
   </message>
   <message name="IDS_ARC_MIGRATE_ENCRYPTION_NOTIFICATION_LOW_BATTERY_MESSAGE" desc="Main message of the notification to navigate the user to first update the device encryption before running Android apps.">
     To use Android apps, charge &amp; update your <ph name="DEVICE_TYPE">$1<ex>Chromebook</ex></ph>.
   </message>
   <message name="IDS_ARC_MIGRATE_ENCRYPTION_NOTIFICATION_RESTART_BUTTON" desc="Label for the button in the notification that navigates the user to sign-out for completing the encryption update step.">
     Sign out &amp; sign back in
   </message>
   <message name="IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_MESSAGE" desc="Message of the toast shown on the first sign-in after the successfully completed migration needed for using Android apps.">
     Update successful. You can now use Android apps.
   </message>
-  <message name="IDS_VOICE_INTERACTION_VALUE_PROP_NO_THANKS_BUTTON" desc="tmp">
+  <message name="IDS_VOICE_INTERACTION_VALUE_PROP_NO_THANKS_BUTTON" desc="Button label for skipping voice interaction value proposition">
     No thanks
   </message>
-  <message name="IDS_VOICE_INTERACTION_VALUE_PROP_CONTINUE_BUTTION" desc="tmp">
+  <message name="IDS_VOICE_INTERACTION_VALUE_PROP_CONTINUE_BUTTION" desc="Button label for accepting voice interaction value proposition">
     Continue
   </message>
   <message name="IDS_WAIT_FOR_CONTAINER_READY_TITLE" desc="tmp">

[xiyuan, 2017/06/22 19:18:56]

This needs some care too.

     Just a sec
   </message>
   <message name="IDS_WAIT_FOR_CONTAINER_READY_INTRO_MESSAGE" desc="tmp">

[xiyuan, 2017/06/22 19:18:56]

ditto

     Ask it questions. Tell it to do things. It's your personal Google, always ready to help.
   </message>
 
   <!-- Print Job Notification -->
   <message name="IDS_PRINT_JOB_PRINTING_NOTIFICATION_TITLE" desc="Title of the printing-in-progress notification.">
     Now printing <ph name="DOCUMENT_NAME">$1<ex>document.pdf</ex></ph>
   </message>
   <message name="IDS_PRINT_JOB_DONE_NOTIFICATION_TITLE" desc="Title of the successful printing notification.">
     Successfully printed <ph name="DOCUMENT_NAME">$1<ex>document.pdf</ex></ph>
   </message>
@@ skipping 42 matching lines @@
     Attempts left: $1
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PIN" desc="The Provider Identification Number abbreviation">
     PIN
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PUK" desc="The Personal Unlocking Key (as used in mobile phones) abbreviation">
     PUK
   </message>
 
 </grit-part>