Monitorffs needs to check the state of usb extcon to pull up
USB gadget. Therefore, this patch add state of usb extcon and
send this information to monitorffs.
Bug: 173086594
Test: verified pass
Change-Id: Ib2a1bb01813490185e1901fafdeba02458332e63
The flag "OLDER_GADGET" is no need.
Using "11110000.dwc3" be the udc name.
Test: Build Pass and boot to home
Bug: 177879761
Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: I43c9e2815a6384c4dffdc47312fa0f372b34d9e9