📈(frontend) stop double-reporting media device failures

Only report `Other` `MediaDeviceFailure` cases as they genuinely
need investigation.

Make sure we do not report the same situation both as a media event
and as a media exception when it is already handled.

src/frontend/src/features/analytics/telemetry.ts

@@ -23,6 +23,7 @@ export type LogCode =
   | 'livekit_room_error'
   | 'device_switch_failure'
   | 'permission_poll_failure'
+  | 'media_devices_error_event'
   // non-media families
   | 'participant_mute_api_failure'
   | 'permissions_api_failure'