metricslogger: fix ACTION_BATTERY_CAUSED_SHUTDOWN not matching proto Bug: 111664962 Test: "pixelstats_client -s" uses the right ATOM value Change-Id: I2944c6d9f79298ce88812fad218552b92afee97a Signed-off-by: Thierry Strudel <tstrudel@google.com> (cherry picked from commit ae2e19dd96e47a084eac09c3b3095b3bef427415)