Revert "Use livekit's Rust SDK instead of their swift SDK (#13343)" (#20809)

Issues found:

* audio does not work well with various set-ups using USB
* switching audio during initial join may leave the client with no audio
at all
* audio streaming is done on the main thread, beachballing certain
set-ups
* worse screenshare quality (seems that there's no dynamic scaling
anymore, compared to the Swift SDK)

This reverts commit 1235d0808e.

Release Notes:

- N/A

crates/collab/src/tests/following_tests.rs

@@ -9,9 +9,10 @@ use collab_ui::{
 use editor::{Editor, ExcerptRange, MultiBuffer};
 use gpui::{
     point, BackgroundExecutor, BorrowAppContext, Context, Entity, SharedString, TestAppContext,
-    TestScreenCaptureSource, View, VisualContext, VisualTestContext,
+    View, VisualContext, VisualTestContext,
 };
 use language::Capability;
+use live_kit_client::MacOSDisplay;
 use project::WorktreeSettings;
 use rpc::proto::PeerId;
 use serde_json::json;
@@ -428,17 +429,17 @@ async fn test_basic_following(
     );
 
     // Client B activates an external window, which causes a new screen-sharing item to be added to the pane.
-    let display = TestScreenCaptureSource::new();
+    let display = MacOSDisplay::new();
     active_call_b
         .update(cx_b, |call, cx| call.set_location(None, cx))
         .await
         .unwrap();
-    cx_b.set_screen_capture_sources(vec![display]);
     active_call_b
         .update(cx_b, |call, cx| {
-            call.room()
-                .unwrap()
-                .update(cx, |room, cx| room.share_screen(cx))
+            call.room().unwrap().update(cx, |room, cx| {
+                room.set_display_sources(vec![display.clone()]);
+                room.share_screen(cx)
+            })
         })
         .await
         .unwrap();