For the data to prioritize long running tasks in ninja, I added the
information about that.
Bug: 271526845
Test: build and check metrics
Change-Id: I76807f9b0d6a50d940b5f35dd6a9ef3cf693eec5
To improve build efficiency, the metrics for critical path and
parallelism ratio is necessary. That information has been included in
soong.log, so added it into metrics as well.
Bug: 271526845
Test: build and check if metrics pb has critical path info
Change-Id: I14e1a78c13d400b792d3b05df18604da48759ade
Keep a running map of the critical path to each edge as it
finishes. At the end of the build, find the edge with the
longest critical path and print the path to out/soong.log.
Test: critical_path_test.go
Change-Id: Ie01d26b068b768156b166bff00cdc3273e8124ca