recovery: add wait for dwc3 device to probe

If fastbootd starts before the dwc3 device probes, fastbootd
would be failed to enable USB gadget.

This patch adds a dependency on the dwc3 device probing before setting
the sys.usb.controller property.

Bug: 220393297
Test: build pass, fastboot works
Change-Id: I4e5b34354f19547f55acc53ccff0b54adce2d982
Signed-off-by: Jimmy Hu <hhhuuu@google.com>