buffet: Add DeviceId DBus property

Privetd needs to be notified when GCD ID is changed.

CQ-DEPEND=CL:260681
BUG=brillo:572
TEST=manual, register device using privetd, edit id in buffet.state, restart
             buffet, check if privetd has new id

Change-Id: I590ee22f134261711f78da75a4766043e0867bf5
Reviewed-on: https://chromium-review.googlesource.com/260303
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
6 files changed
tree: 693628089cb188fbd7cc0585340626f35e822196
  1. buffet/