Some names can include commas, and if they're not surrounded by quotes, then CSV parsing breaks, as was the case in https://github.com/google/battery-historian/issues/94#issuecomment-282790498 and several other circumstances. Test: flashed local device and ran batterystats output through Historian Change-Id: I070c5d873d9f79996a581bf0a5f664136c0af454