Move `setprop sys.usb.configfs 0` to `on init` action

This should solve the problem of
`property:sys.usb.config=adb && property:sys.usb.configfs=0` action
being wrongly triggered during userspace reboot.

Also reset some adbd-related property in `on userspace-reboot-requested`
action to make sure that userspace reboot sequence is as close as
possible to normal boot sequence w.r.t adbd.

Test: adb reboot userspace
Test: checked property:sys.usb.config=adb && property:sys.usb.configfs=0
  action is not triggered

Bug: 135984674
Change-Id: Icf40386399ee84d01228020e65f71ba473d72822