Add resetUsbPort in svc usb command

Implement resetUsbPort to support manual testing on
real device to verify feature functionality from App layer
and VTS test.

Bug: 216387845
Test: Manual test with "svc usb reset UsbPort" correctly

Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: Ieb29de3dd398859607490548a1f3a16f8359ae8f