System notification settings in the app

[BijinDev]

Notification permission/status is not displayed in the app.
#8654

From spike : https://github.com/tutao/private-issues/issues/235

Create a dropdown similar to the calendar notification setting, from where user can Enable/Disable system notification.

• When enabling the button it should
  • ask for system permission or open settings.
  • When we received the permission we schedule alarms
  • ensure that push identifier is enabled
  • Enable calendar event notification setting.
• When disabling the button we,
  • keep the system permission state.
  • disable push identifier for the user and unschedule alarms
  • The calendar event notification setting is disabled.