UsbDeviceManager: add back support for USB overlays

Commit fcf10f7c12cb3107bdfedce6f76a8c866d154f3c removed support for USB
overlays. Add it back in, as some devices depend on it.

Bug: 22062484
Bug: 21195124
Change-Id: I74d12699201355b07475744c641e31fdc4bb5a4a
1 file changed