Update mic/cam toggles to the latest UI mocks

This touches the sensor use dialog and the notification.
Also we shouldn't leak listeners every time the dialg is made.

TODO: Detect when both camera and mic are opened at the same time
TODO: Settings page

Test: Manually open all UI available
Bug: 183985427
Change-Id: Ie743f402835d8fd3e644a0374f03062f0a61c31a