Revert "adb: close ep0 on disconnection." am: 8c4076295e
am: 8edfe2040b

* commit '8edfe2040b4c612915bc2cbf1a6db321f586f9fc':
  Revert "adb: close ep0 on disconnection."

Change-Id: I7ec010cf3e36037fc8af04419f85e51f68595c21