bootanalyze: su root instead of adb root

bug: 33210752
Test: manual script run, python packages/services/Car/tools/bootanalyze/bootanalyze.py -r -c packages/services/Car/tools/bootanalyze/config.yaml -n 2
Change-Id: If2bb28fa397f20f4c0544eaf565821bad7b4d761
1 file changed