* New uses-policies value
* Definitions for storage domain and encryption status
* API to get and set encryption status
* Intent to launch encryption changes
* Both new calls bottom out in the DPM service and are suitable for
a device that does not support encryption.
NOTE: Nobody should use ACTION_START_ENCRYPTION yet. It needs a receiver
to be built in Settings (different CL).
Change-Id: I2ae193bedbec59f6ba46c0ec7de12ecf321e5803