Support for SFUs

Mostly just using the right js-sdk, then adding temporary config for
which SFU to use until we can get it from the homeserver.

src/ClientContext.tsx

@@ -33,7 +33,6 @@ import { ErrorView } from "./FullScreenView";
 import {
   initClient,
   CryptoStoreIntegrityError,
-  fallbackICEServerAllowed,
 } from "./matrix-utils";
 import { widget } from "./widget";
 import { PosthogAnalytics, RegistrationType } from "./PosthogAnalytics";
@@ -143,7 +142,6 @@ export const ClientProvider: FC<Props> = ({ children }) => {
                   accessToken: access_token,
                   userId: user_id,
                   deviceId: device_id,
-                  fallbackICEServerAllowed: fallbackICEServerAllowed,
                 },
                 true
               ),
@@ -159,7 +157,6 @@ export const ClientProvider: FC<Props> = ({ children }) => {
                     accessToken: access_token,
                     userId: user_id,
                     deviceId: device_id,
-                    fallbackICEServerAllowed: fallbackICEServerAllowed,
                   },
                   false // Don't need the crypto store just to log out
                 );