Ensure call sound effects are played over the correct sink (#2863)

* Refactor to use AudioContext

* Remove unused audio format.

* Reduce update frequency for volume

* Port to useAudioContext

* Port reactionaudiorenderer to useAudioContext

* Integrate raise hand sound into call event renderer.

* Simplify reaction sounds

* only play one sound per reaction type

* Start to build out tests

* fixup tests / comments

* Fix reaction sound

* remove console line

* Remove another debug line.

* fix lint

* Use testing library click

* lint

* fix a few things

* Change the way we as unknown the mock RTC session.

* Lint

* Fix types for MockRTCSession

* value change should always be set

* Update volume slider description.

* Only load reaction sound effects if enabled.

* cache improvements

* lowercase soundMap

* lint

* move prefetch sounds to fix hot reload

* correct docs

* add a header

* Wording change

---------

Co-authored-by: Hugh Nimmo-Smith <hughns@element.io>

src/livekit/MediaDevicesContext.tsx

@@ -115,12 +115,12 @@ function useMediaDevice(
   }, [available, preferredId, select, alwaysDefault]);
 }
 
-const deviceStub: MediaDevice = {
+export const deviceStub: MediaDevice = {
   available: [],
   selectedId: undefined,
   select: () => {},
 };
-const devicesStub: MediaDevices = {
+export const devicesStub: MediaDevices = {
   audioInput: deviceStub,
   audioOutput: deviceStub,
   videoInput: deviceStub,