GitLab

- Adds helper methods to convert between fields in the
PowerSupplyProperties proto and new mojom enums.

Bug: 1128204
Change-Id: I1ceeb4e9987b5975189a725d8f346c39b45186b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431477Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812546}