Add StartTPMFirmwareUpdate session_manager constants.

BUG=chromium:742985
TEST=None

Change-Id: I34d5cb99182efbf5956914470e3a125d4c95dddb
Reviewed-on: https://chromium-review.googlesource.com/575244
Commit-Ready: Mattias Nissler <mnissler@chromium.org>
Tested-by: Mattias Nissler <mnissler@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
1 file changed