Always add new interfaces to the bottom of the aidl
or you break backwards compatability.
Change-Id: I376fbe6869d3fb0002822112eb05d9acddd51572
TICKET: CYNGNOS-1699
* Add support for reading and writing values from/to persistent
storage. Requires the MANAGE_PERSISTENT_STORAGE permission, which
should not be available for general use by applications.
Change-Id: I8a793396d207f23fcda851c172372f2073778eec