Display filtered posts with a warning (#406)

* copy changes from @LucasGGamerM
* simplify building filter item
* fix adapter ranges
* change filter item styling

closes sk22#209 

Co-authored-by: LucasGGamerM <71328265+LucasGGamerM@users.noreply.github.com>

mastodon/src/main/java/org/joinmastodon/android/utils/StatusFilterPredicate.java

@@ -38,4 +38,22 @@ public class StatusFilterPredicate implements Predicate<Status>{
 		}
 		return true;
 	}
+
+	public boolean testWithWarning(Status status) {
+		if(status.filtered!=null){
+			if (status.filtered.isEmpty()){
+				return true;
+			}
+			boolean matches=status.filtered.stream()
+					.map(filterResult->filterResult.filter)
+					.filter(filter->filter.expiresAt==null||filter.expiresAt.isAfter(Instant.now()))
+					.anyMatch(filter->filter.filterAction==Filter.FilterAction.WARN);
+			return !matches;
+		}
+		for(Filter filter:filters){
+			if(filter.matches(status))
+				return false;
+		}
+		return true;
+	}
 }