fastboot: Workaround for touchbar hang on MBP 2016

fastboot will try to set usb configuration on connected
usb devices. When it tries to change the usb configuration
on iBridge device on MBP 2016 model, it hangs, and frozen
the touchbar. Skip set usb configuration.

Bug: https://code.google.com/p/android/issues/detail?id=231129
Change-Id: Ib055fc0524d26092555fc135588fa362e70eeb39
(cherry picked from commit d23afb59)