Use state handler instead of get_users_in_room/get_joined_hosts

synapse/federation/federation_client.py

synapse/handlers/directory.py

synapse/handlers/events.py

synapse/handlers/presence.py

synapse/handlers/receipts.py

synapse/handlers/sync.py

synapse/handlers/typing.py

synapse/push/bulk_push_rule_evaluator.py

synapse/replication/slave/storage/events.py

synapse/state.py

synapse/storage/events.py

synapse/storage/roommember.py