Handle "Allow non-provisionable devices" properly

* Send policy key of "0" when validating; this gets us the policies
  even if "Allow..." is enabled (currently, we simply don't see the
* If we don't support all of the policies, send back the response
  code indicating support for partial support.  If we get a positive
  response back, then we're good to go - the server allows devices
  with partial support.  Otherwise, we fail as we always have - with
  the toast indicating that the device doesn't support required
* Remove PolicySet.isSupported() and ensure proper field ranges
  within the constructor
* Update tests as appropriate

Bug: 2759782
Change-Id: I5f354a0e2d81844aff75d8a8a6de3b97f0020c1f
5 files changed