This is the start of a reworking of our docs around the
secrets API. There will be a number of follow-up patches
before this document will be considered complete.
Until this document is considered complete, I'm not adding
this page to the table of contents. Also, to limit
individual CR size, I've tossed TODOs on the areas that
will be worked on in future CRs.
Change-Id: I8599628d51f4b5aae9ec1b8fd76f419d5b38bdcc
3c935a82d1