cros_source & robocrop: add repostate for cros_cource; clean up robocrop format

cros_source: add in Repostate as defined in go/cros-source-cache-health

RoboCrop: pull up enum so code isn't redundant. Clean up spacing I probably
tweaked when I last made changes.

BUG=b/177572611
TEST=NONE

Change-Id: I5e3a2014f1d44c7de45b5052e954a3e3b3daf338
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2633877
Reviewed-by: Mike Nichols <mikenichols@chromium.org>
Commit-Queue: Julio Hurtado <juahurta@google.com>
4 files changed