am 1337d0f7: Implement issue #3094621 and #3094609 - wipe sd card

Merge commit '1337d0f70b18dd732c6a617be83e5be0bb8f2f87' into gingerbread-plus-aosp

* commit '1337d0f70b18dd732c6a617be83e5be0bb8f2f87':
  Implement issue #3094621 and #3094609 - wipe sd card