Add a setting for the User Absent, Touch Off feature in Wear

This is an extension of the User Absent power feature on Wear aka "for small batteries". Turning the
sensor off is one of the aspects of power saving we want to take advantage of when the user is
absent.

Bug: 77293569
Test: make -j80
Test: Device boots
Change-Id: I25a3577d8eb2d157c20ed344056138bc32e8d158