am 0846a2f5: cherrypick Change-Id: I7033e605213db4b5c73c09c2207bed68a704aa72 docs: update sitemap add new webmaster tools verification file

* commit '0846a2f5ec77a8862d92430b6721da0960d0d001':
  cherrypick Change-Id: I7033e605213db4b5c73c09c2207bed68a704aa72 docs: update sitemap add new webmaster tools verification file