md swap calls

const MdSwapCallsIcon = (props) => (
  <svg 
    xmlns="http://www.w3.org/2000/svg" 
    viewBox="0 0 24 24" 
    width="24"
    height="24"
    fill="none" 
    stroke="currentColor" 
    strokeWidth="2" 
    strokeLinecap="round" 
    strokeLinejoin="round" 
    {...props}
  >
    <path d="M0 0h24v24H0V0z" fill="none"/><path d="M18 4l-4 4h3v7c0 1.1-.9 2-2 2s-2-.9-2-2V8c0-2.21-1.79-4-4-4S5 5.79 5 8v7H2l4 4 4-4H7V8c0-1.1.9-2 2-2s2 .9 2 2v7c0 2.21 1.79 4 4 4s4-1.79 4-4V8h3l-4-4z"/>
  </svg>
);