title: en-IN locale not working for angular currency pipe
body: <p>From <a href="https://en.wikipedia.org/wiki/Indian_numbering_system" rel="nofollow noreferrer">Wikipedia</a>: </p>
  
  <blockquote>
    <p>The Indian numbering system uses separators differently from the international norm. Instead of grouping digits by threes as in the international system, It groups the rightmost three digits together (till the hundreds place) and thereafter groups by sets of two digits. One trillion would thus be written as 10,00,00,00,00,000.</p>
  </blockquote>
  
  <p><code>toLocaleString</code> function of JavaScript returns in correct format for <code>en-IN</code> locale.</p>
  
  <pre><code>(123456789).toLocaleString('en-IN', {
      style: 'currency',
      currency: 'INR',
      minimumFractionDigits: 2,
      maximumFractionDigits: 2
  })  //  ₹ 12,34,56,789.00
  </code></pre>
  
  <p>But Angular's currency pipe doesn't return the same output for <code>en-IN</code> locale. Do I need to create custom pipe?</p>
  
  <pre><code>{{ 123456789 | currency : 'INR' : 'symbol': '1.2-2' : 'en-IN' }}
  &lt;!-- ₹123,456,789.00 --&gt;
  </code></pre>