am 364d02d4: Refer to USB storage instead of SD card if external storage is not removable.

Merge commit '364d02d46c2b73603dda32e8d18cea264df208d6' into gingerbread-plus-aosp

* commit '364d02d46c2b73603dda32e8d18cea264df208d6':
  Refer to USB storage instead of SD card if external storage is not removable.