add more boot animation events

- add rendering start and surface flinger wait completion point.

bug: 38450031
Test: ython packages/services/Car/tools/bootanalyze/bootanalyze.py -r -c packages/services/Car/tools/bootanalyze/config.yaml -n 20 -f -e 14.8 -w 30 -v
Change-Id: I06c9b378af8eeff21339a5846e5c4a08a6421501
1 file changed