Google meet NEW UI attendance,messages RGUKT per kingmohan45

Video regarding installation and usage : https://youtu.be/GesqoOMmHkg
Features:
* Records person's session-time(how many minutes a person stayed on page)
* if someone messages even if you aren't active on that tab you will get a desktop notification
* one will get desktop notification when someone raise hand
* one can start or stop recording by default it will be started
* one can download CSV file with id (if any), names and session times separated by ',' at any instance of time
* when user click end call button, the file will be downloaded automatically and on the second time user click end call button, the call will be ended. This helps if user forget to download the attendance
* notifies when one's internet connectivity is fluctuating.
** those were working at the time of publishing(as of observed tests), feel free to mail me issues if any.