Revert "UsbDeviceManager: Fix race condition between accessory start and USB configured uevents"

This reverts commit fbd5521f.

This change broke support for the 2011 ADK board, which never sends a "set configuration"
command before "accessory start".  So we revert this change and will replace it with a better fix.

Bug: 13535051
Bug: 13393825

Change-Id: Icd870d7ff6daff1567e04d93907f70f5d7e37884