am 42499170: Implement issue #3094621 and #3094609 - wipe sd card

Merge commit '424991704b5fb7a64f6cf0fcc3f4b1aabbf2a2e0' into gingerbread-plus-aosp

* commit '424991704b5fb7a64f6cf0fcc3f4b1aabbf2a2e0':
  Implement issue #3094621 and #3094609 - wipe sd card