Reset protection in PersistentDataBlockManager

Add method to allow authorized data block wipe in support of factory
reset protection. This will allow ManagedProvisioning to respond to
and pass factory reset protection challenges during automated device
setup.
- Adds the wipeIfAllowed method to clear the data block
- Creates a protected-broadcast to send to allowed package

Bug: 19792435
Change-Id: I897f2ea2afb1222a1fc8ac49290ee45ea4d3f2d7