Polls part 1 - displaying in timelines and voting (#1200)

* add entity classes

* change data models and add database migration

* add polls to StatusViewData

* show poll results

* add methods for vote handling

* add voting interface

* enable voting in TimelineFragment

* update polls immediately

* enable custom emojis for poll options

* enable voting from search fragment

* add voting layout to detailed statuses

* fix tests

* enable voting in ViewThreadFragment

* enable voting in ConversationsFragment

* small refactor for StatusBaseViewHolder

app/src/main/java/com/keylesspalace/tusky/util/ViewDataUtils.java

@@ -63,8 +63,8 @@ public final class ViewDataUtils {
                         SmartLengthInputFilter.LENGTH_DEFAULT
                 ))
                 .setCollapsed(true)
+                .setPoll(visibleStatus.getPoll())
                 .setIsBot(visibleStatus.getAccount().getBot())
-
                 .createStatusViewData();
     }