Add fetching the well known in embedded mode.

This is used to load the focus from the well known in elment-call.

src/client.ts

@@ -7410,7 +7410,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
         return this.http.authedRequest(Method.Post, path, undefined, undefined, { prefix: "" });
     }
 
-    private async fetchClientWellKnown(): Promise<void> {
+    public async fetchClientWellKnown(): Promise<void> {
         // `getRawClientConfig` does not throw or reject on network errors, instead
         // it absorbs errors and returns `{}`.
         this.clientWellKnownPromise = AutoDiscovery.getRawClientConfig(this.getDomain() ?? undefined);

src/embedded.ts

@@ -218,6 +218,14 @@ export class RoomWidgetClient extends MatrixClient {
                 });
             }) ?? [],
         );
+
+        if (opts.clientWellKnownPollPeriod !== undefined) {
+            this.clientWellKnownIntervalID = setInterval(() => {
+                this.fetchClientWellKnown();
+            }, 1000 * opts.clientWellKnownPollPeriod);
+            this.fetchClientWellKnown();
+        }
+
         this.setSyncState(SyncState.Syncing);
         logger.info("Finished backfilling events");
 

src/matrixrtc/MatrixRTCSession.ts

@@ -825,7 +825,8 @@ export class MatrixRTCSession extends TypedEventEmitter<MatrixRTCSessionEvent, M
 
         const myCallMemberEvent = roomState.getStateEvents(EventType.GroupCallMemberPrefix, localUserId) ?? undefined;
         const content = myCallMemberEvent?.getContent() ?? {};
-        const legacy = "memberships" in content || this.useLegacyMemberEvents;
+        const legacy =
+            (("memberships" in content && content.membership?.length) ?? 0 > 0) || this.useLegacyMemberEvents;
         let newContent: {} | ExperimentalGroupCallRoomMemberState | SessionMembershipData = {};
         if (legacy) {
             let myPrevMembership: CallMembership | undefined;
@@ -866,7 +867,7 @@ export class MatrixRTCSession extends TypedEventEmitter<MatrixRTCSessionEvent, M
                 this.room.roomId,
                 EventType.GroupCallMemberPrefix,
                 newContent,
-                this.useLegacyMemberEvents ? localUserId : `${localUserId}_${localDeviceId}`,
+                legacy ? localUserId : `_${localUserId}_${localDeviceId}`,
             );
             logger.info(`Sent updated call member event.`);