Add Sensors Off QS tile and display status bar icon when active

This CL will replace the SensorPrivacyTile with a new tile that can be
enabled from the developer settings. When this new tile is enabled only
the camera, mic, and sensors controlled by the SensorManager will be
disabled; the location and airplane mode tiles will not be modified.
The user will be notified when this tile is enabled with the sensors
off icon in the status bar.

Fixes: 126618519
Test: Manually verified airplane and location are not modified when sensors
      off is enabled; also verified icon is displayed when mode is active.

Change-Id: Iabf099d0d76c015015ce9859edc0b225ec554020