trunks: set long reply timeout in dbus configuration

Set reply timeout in dbus for trunksd to 4 min. tpm_manager may
request to TakeOwnership, which may take 2-3 min. With default
dbus settings, tpm_manager gets a timeout while waiting on trunksd
to finish the operation.

BUG=chromium:623100
TEST=Boot on kevin, do "tpm_manager_client take_ownership"

Change-Id: I13861da82ea83ca1f87cd726a2084eb53429e294
Reviewed-on: https://chromium-review.googlesource.com/357920
Commit-Ready: Andrey Pronin <apronin@chromium.org>
Tested-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Darren Krahn <dkrahn@chromium.org>
1 file changed