fix tile flicker on video mute/unmute

(only pass rtcBackendIdenitity instead of full rtcMember)

src/state/ScreenShare.ts

@@ -10,7 +10,6 @@ import {
   type RemoteParticipant,
   type Room as LivekitRoom,
 } from "livekit-client";
-import { type CallMembership } from "matrix-js-sdk/lib/matrixrtc/CallMembership";
 
 import { type ObservableScope } from "./ObservableScope.ts";
 import { ScreenShareViewModel } from "./MediaViewModel.ts";
@@ -29,7 +28,7 @@ export class ScreenShare {
     private readonly scope: ObservableScope,
     id: string,
     userId: string,
-    rtcMember: CallMembership,
+    rtcBackendIdentity: string,
     participant: LocalParticipant | RemoteParticipant,
     encryptionSystem: EncryptionSystem,
     livekitRoom$: Behavior<LivekitRoom | undefined>,
@@ -42,7 +41,7 @@ export class ScreenShare {
       this.scope,
       id,
       userId,
-      rtcMember,
+      rtcBackendIdentity,
       of(participant),
       encryptionSystem,
       livekitRoom$,