Ensure permission request for listDevices works also in Firefox (#1188)

* Ensure permission request for listDevices works also in Firefox

* Create witty-melons-clean.md

.changeset/witty-melons-clean.md

@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+Ensure permission request for listDevices works for audio outputs in Firefox

src/room/DeviceManager.ts

@@ -41,7 +41,7 @@ export default class DeviceManager {
       !(isSafari() && this.hasDeviceInUse(kind))
     ) {
       const isDummyDeviceOrEmpty =
-        devices.length === 0 ||
+        devices.filter((d) => d.kind === kind).length === 0 ||
         devices.some((device) => {
           const noLabel = device.label === '';
           const isRelevant = kind ? device.kind === kind : true;