feat(ui): Add the MemberHints state event type to the required state

This state event allows us to correctly calculate the room display name
according to MSC4171.

MSC: matrix-org/matrix-spec-proposals#4171

Author: poljar

crates/matrix-sdk-ui/src/room_list_service/mod.rs

@@ -92,6 +92,8 @@ const DEFAULT_REQUIRED_STATE: &[(StateEventType, &str)] = &[
     // Those two events are required to properly compute room previews.
     (StateEventType::RoomCreate, ""),
     (StateEventType::RoomHistoryVisibility, ""),
+    // Required to correctly calculate the room display name.
+    (StateEventType::MemberHints, ""),
 ];
 
 /// The default `required_state` constant value for sliding sync room

crates/matrix-sdk-ui/tests/integration/room_list_service.rs

@@ -365,6 +365,7 @@ async fn test_sync_all_states() -> Result<(), Error> {
                         ["m.room.join_rules", ""],
                         ["m.room.create", ""],
                         ["m.room.history_visibility", ""],
+                        ["io.element.functional_members", ""],
                     ],
                     "include_heroes": true,
                     "filters": {
@@ -2232,6 +2233,7 @@ async fn test_room_subscription() -> Result<(), Error> {
                         ["m.room.join_rules", ""],
                         ["m.room.create", ""],
                         ["m.room.history_visibility", ""],
+                        ["io.element.functional_members", ""],
                         ["m.room.pinned_events", ""],
                     ],
                     "timeline_limit": 20,
@@ -2272,6 +2274,7 @@ async fn test_room_subscription() -> Result<(), Error> {
                         ["m.room.join_rules", ""],
                         ["m.room.create", ""],
                         ["m.room.history_visibility", ""],
+                        ["io.element.functional_members", ""],
                         ["m.room.pinned_events", ""],
                     ],
                     "timeline_limit": 20,