Un-deprecate supervision_transition field.

Child accounts can graduate from supervision, however we must only
trigger graduation flow when there was a transition from child to
regular. Otherwise, we'll affect other managed user types, which may
also exit management.

These bits are sent during boot instead of via a mojo IPC, so we can
avoid making blocking mojo calls from Android on every startup to obtain
that information.

BUG=chromium:836246
TEST=no

Change-Id: I16c85dde6ec8a2880ba8c3549826af9448308aa7
Reviewed-on: https://chromium-review.googlesource.com/1129700
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Patricia Hongo <phongo@google.com>
Reviewed-by: Dan Erat <derat@chromium.org>
1 file changed