[audio] Clear mediaFlowing/State timeouts on stop

This should avoid a race condition where a session was stopped before the media trigger cleared the timeouts and they would cause a leak and/r incorrectly trigger a trailing timeout on a probable successful reconnection

lib/audio/audio.js

@@ -608,6 +608,8 @@ module.exports = class Audio extends BaseProvider {
 
     delete this.candidatesQueue[connectionId];
     delete this.audioEndpoints[connectionId];
+    this.clearMediaFlowingTimeout(connectionId);
+    this.clearMediaStateTimeout(connectionId);
   }
 
   async stop () {