metrics: add HwWatchdogReboot to CrosEvents

Add HwWatchdogReboot to CrosEvents support.

BUG=chromium:221000
TEST=none

Change-Id: I7388c6d1ee93a73f930d591552b18ea7bba7743f
Signed-off-by: Grant Grundler <grundler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/46593
Reviewed-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
1 file changed