Add begin_params to CreationOperation.

Allowing several crypto parameters to be repeated on keys means we need
to be able to specify them at operation time, which means they'll be
passed in to the begin() params.  This change makes it possible for
operations to actually receive these values.

Bug: 19509156
Change-Id: I4504f5206d93ce3040b6a5a8d8dacb5b08eb2b90
6 files changed