authpolicy: Add password and last error status

Adds data so that Chrome can detect situations where it has to prompt
the user to relog and possibly change their password or enter the new
one if it changed on the server. The corresponding authpolicyd change
is in CL:484320.

BUG=chromium:713827
TEST=Compiles

Change-Id: Ib1aa476d467290ae7680da8e2dd4a883a3680dc4
Reviewed-on: https://chromium-review.googlesource.com/483403
Commit-Ready: Lutz Justen <ljusten@chromium.org>
Tested-by: Lutz Justen <ljusten@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
1 file changed