add more stages for init

- will help breaking down latency in init

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: I675956d3dc7d11ef6d4b5d0ea110bcc39f89ebe3
1 file changed