GitLab

When the device is disabled, we receive from the server
RESTORE_MODE_DISABLED mode. The client has no information if the policy
forces to re-enroll or not. In the initial implementation it was treated
as device not being forced to re-enroll. This change fixes that case, so
that the flags from VPD don't get deleted for disabled device.

Also with a test image, the install_attributes file is deleted while
the checksum remain on disk. This has yet to be investigated, but to
avoid any problems when install_attributes file is corrupted, we set
the device as being in DEVICE_MODE_ENTERPRISE if auto_enrollment
detects the device is disabled.

BUG=chromium:996059
TEST=Manual tests and unit tests

Change-Id: I8bc30028af043fdb563e6374d7e5db4b30830218
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1771966Reviewed-by: Igor <igorcov@chromium.org>
Reviewed-by: Bartosz Fabianowski <bartfab@chromium.org>
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Igor <igorcov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692052}