am 4cc86e1a: Clear the device\'s data from the transport when backup is disabled

Merge commit '4cc86e1ae80eb1938500fe5fa06bbdf8b4b7b50d' into eclair-plus-aosp

* commit '4cc86e1ae80eb1938500fe5fa06bbdf8b4b7b50d':
  Clear the device's data from the transport when backup is disabled