title: In-app Billing V3 getSkuDetails() returns empty DETAILS_LIST
body: <p>I've noticed <code>getSkuDetails()</code> intermittently returns an empty or partial <code>DETAILS_LIST</code> with <code>RESPONSE_CODE=0</code>. My application is published in Draft mode, and my Gmail address is on the list of accounts with testing access. After a day or so the problem seems to resolve without any action.</p>
  
  <ul>
  <li>Could my application be misconfigured in the Developer Console?</li>
  <li>Have others observed this in unpublished applications or have another explanation?</li>
  </ul>