Room list service (#1138)

* Adopt the new RoomListService

* Use client.roomListWithEncryption

* Store the roomList so that it doesn't get dropped and create problems on the rust side

* Use roomListService instead of old roomList client method

* Added back documentation removed by mistake

* Tweaks following code review, SDK bump

.swiftlint.yml

@@ -3,7 +3,6 @@ disabled_rules:
   - unused_setter_value
   - redundant_discardable_let
   - identifier_name
-  - unhandled_throwing_task
 
 opt_in_rules:  
   - force_unwrapping