The scope property indicates the operating mode of the system. This property could be used to switch to and from usb host mode. Add a helper api to update this property. CRs-Fixed: 373365 Change-Id: I5fb57f7b1075276ba90b0f7e0a44626e07ee196f Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>