Export usb connection status
There are several components depends on kernel export usb connection
status correctly. First, system-server check usb status by calling OEM
interface to launch usb-server; second, usb-server does the usb mode
setting work and launch syspopup. In addition, setting usb mode from UI
depends on usb-server too.
This also fix TZSP-3142.
Signed-off-by: Chengwei Yang <chengwei.yang@intel.com>
[Port from mfld kernel and support CTP]
Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>