Use tags from status when adding handlers to hashtag spans in status content (#2344)

* Migrate LinkHelper to kotlin

* Support tags field on statuses

* Use embedded tags list in status instead of text scraping to embed tag click handler.
Fixes #2283

* Make mentions and tags lists nonnullable

* Make LinkHelper.openLink a Context extension method

* Use builtin extension for uri conversion

* More cleanup in LinkHelper

* Add tests for LinkHelper.getDomain

* Unbreak tags in places that don't have a tag list (e.g. profiles)

* Fixup javadoc

app/src/main/java/com/keylesspalace/tusky/util/NoUnderlineURLSpan.kt

@@ -29,6 +29,6 @@ open class NoUnderlineURLSpan(
     }
 
     override fun onClick(view: View) {
-        LinkHelper.openLink(url, view.context)
+        view.context.openLink(url)
     }
 }