- Top-level trace for all soong_build runs
- Includes adding Peek() to OncePer because not all soong_build
invocations have GenerateBuildActions run.
- A trace per mutator invocation
Test: m && build/bazel/scripts/print_analysis_metrics.py
Change-Id: Ief5c04630484fb38ec7e3757de45c7dc294d3b3c