add bootloader time to bootanalyze

bug: 38271495
Test: python packages/services/Car/tools/bootanalyze/bootanalyze.py -r -c packages/services/Car/tools/bootanalyze/config.yaml -n 10 -f -e 16 -w 30 -v

Change-Id: I3253bdbe533e28499b725c4eb2283b141e545790
2 files changed