buffet: Add GCD device draft record to device registration

Use the command definitions provided by Command Manager in
device registration record sent to GCD server.

BUG=chromium:396716
TEST=USE=buffet P2_TEST_FILTER="buffet::*" FEATURES=test emerge-link platform2

Change-Id: If9109bfee8862d9252cdb03301a4362492064809
Reviewed-on: https://chromium-review.googlesource.com/210146
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
5 files changed
tree: 6608922bca36777456a45ff532aa27083275c619
  1. buffet/