fix(StatusDisplayItem): explictly copy filter list

Fixes an issue, where the app could crash when trying to add client-side
filters to an immutable list. This was the case for viewing scheduled
statuses

mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/StatusDisplayItem.java

@@ -230,7 +230,7 @@ public static ArrayList<StatusDisplayItem> buildItems(BaseStatusListFragment<?>
 
 			LegacyFilter applyingFilter=null;
 			if(status.filtered!=null){
-				List<FilterResult> filters=status.filtered;
+				ArrayList<FilterResult> filters= new ArrayList<>(status.filtered);
 
 				// Only add client filters if there are no pre-existing status filter
 				if(filters.isEmpty())