Created a ClientSiteLinkLookup to query sitelinks

The class allows to get the sitelinks connected with a given title and
also includes the badges of this sitelink by loading the cached entity.

Change-Id: Ibc0471ce1c08d8b52b5f56f97375022b0d8ef910
Merge "Created a ClientSiteLinkLookup to query sitelinks"