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/test/java/com/keylesspalace/tusky/BottomSheetActivityTest.kt

@@ -84,7 +84,8 @@ class BottomSheetActivityTest {
             ArrayList(),
             arrayOf(),
             null,
-            pinned = false
+            pinned = false,
+            poll = null
     )
     private val statusCallback = FakeSearchResults(status)
 

app/src/test/java/com/keylesspalace/tusky/fragment/TimelineRepositoryTest.kt

@@ -305,7 +305,8 @@ class TimelineRepositoryTest {
                 inReplyToId = null,
                 pinned = false,
                 reblog = null,
-                url = "http://example.com/statuses/$id"
+                url = "http://example.com/statuses/$id",
+                poll = null
         )
     }