Inserts badges into the SiteLinkView

For each badge a <span> element is created with some css classes to define
their icon. Currently only one default icon is added but others can be
added later.

The title of the icon is the serialized item id of the badge at the
moment. This should be replaced by the label if available but we have
to find a nice and efficient way to get an item's labels.

Bug: 67668
Change-Id: I159d53c52b9a61edf3a80b17d0c7238e9195b0e9
Merge "Inserts badges into the SiteLinkView"