buffet: Integrate the XmppClient into buffet

TEST=FEATURES=test emerge-${BOARD} buffet
BUG=brillo:95

Change-Id: Ife3abac34db8e331d936891cfe4f3e937ecfb49c
Reviewed-on: https://chromium-review.googlesource.com/250462
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Nathan Bullock <nathanbullock@google.com>
Tested-by: Nathan Bullock <nathanbullock@google.com>
3 files changed
tree: a5f152dd6db03926c0d8ee2dbd44a936a42259ca
  1. buffet/