Improvement feature circle discussion (#977)

* Improvment circle discussion
 - Change to lissen start event of WebRTC connection

* Update help allow navigator and waring message
 - Show warning message.
 - Use help camera allow setting to show modal and help user.
 - Change feature to show the modal only when user have need the information on allow navigator access

* Create soud for video discussion

front/src/Phaser/Login/EnableCameraScene.ts

@@ -247,8 +247,7 @@ export class EnableCameraScene extends Phaser.Scene {
 
     update(time: number, delta: number): void {
         this.soundMeterSprite.setVolume(this.soundMeter.getVolume());
-
-        mediaManager.setLastUpdateScene();
+        mediaManager.updateScene();
 
         const middleX = this.getMiddleX();
         this.tweens.add({