am 6d44456d: Merge "Make USB mass storage hide keyguard when shown." into gingerbread

Merge commit '6d44456da87dccb15b4086696f5e72a5aa198926' into gingerbread-plus-aosp

* commit '6d44456da87dccb15b4086696f5e72a5aa198926':
  Make USB mass storage hide keyguard when shown.