Proto declaration: report 3 VPD fields in DeviceRegisterRequest

Add 3 more VPD fields to be reported on the device registration:
- ethernet_mac0,
- mfg_date,
- dock_mac.

BUG=b:124364709
TEST=build

Change-Id: Ic09d1dc24ec06ba427b4653269895478c45d09bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1561094
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#650725}