am 9d6be2ba: Add backup string for a platform setting to enable or disable advanced audio recording features on QSD8k phones.

Merge commit '9d6be2baf517462d2cce818c21b25958a40e4f06' into eclair-mr2

* commit '9d6be2baf517462d2cce818c21b25958a40e4f06':
  Add backup string for a platform setting to enable or disable