bootanalyze: add launcher launch time

- wait until launcher is started
- monitor kernel log first as too much wait in logcat can drop some kernel logs

bug: 33210752
Test: python packages/services/Car/tools/bootanalyze/bootanalyze.py -r -c packages/services/Car/tools/bootanalyze/config.yaml -n 10
Change-Id: Ic558636d6aaed4425ba81a583a0eaa55c990f813
2 files changed