feat: add option to view poll results (#935)

* feat: add option to view poll results

* fix: button showing wrong text when refreshing

* fix: hide results button when voted

* remove unused string

* change view results layout, remove unused setting

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Co-authored-by: sk <sk22@mailbox.org>

mastodon/src/main/res/values-zh-rTW/strings_sk.xml

@@ -2,7 +2,6 @@
 <resources>
     <string name="sk_notification_type_status">鋪文</string>
     <string name="sk_notification_type_posts">嘟文通知</string>
-    <string name="sk_poll_allow_multiple">允許複選</string>
     <string name="sk_translate_post">翻譯</string>
     <string name="sk_translated_using">通過 %s 翻譯</string>
     <string name="sk_post_language">語言: %s</string>