Add critical path infomation into metrics

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

cmd/soong_ui/main.go

@@ -180,14 +180,15 @@ func main() {
 		log.Cleanup()
 		stat.Finish()
 	})
-
+	criticalPath := status.NewCriticalPath()
 	buildCtx := build.Context{ContextImpl: &build.ContextImpl{
-		Context: ctx,
-		Logger:  log,
-		Metrics: met,
-		Tracer:  trace,
-		Writer:  output,
-		Status:  stat,
+		Context:      ctx,
+		Logger:       log,
+		Metrics:      met,
+		Tracer:       trace,
+		Writer:       output,
+		Status:       stat,
+		CriticalPath: criticalPath,
 	}}
 
 	config := c.config(buildCtx, args...)
@@ -224,6 +225,8 @@ func main() {
 		defer build.UploadMetrics(buildCtx, config, c.simpleOutput, buildStarted, bazelProfileFile, bazelMetricsFile, metricsFiles...)
 	}
 	defer met.Dump(soongMetricsFile)
+	// Should run before Metric.Dump
+	defer criticalPath.WriteToMetrics(met)
 
 	c.run(buildCtx, config, args)
 
@@ -254,7 +257,7 @@ func logAndSymlinkSetup(buildCtx build.Context, config build.Config) {
 	stat.AddOutput(status.NewVerboseLog(log, filepath.Join(logsDir, logsPrefix+"verbose.log")))
 	stat.AddOutput(status.NewErrorLog(log, filepath.Join(logsDir, logsPrefix+"error.log")))
 	stat.AddOutput(status.NewProtoErrorLog(log, buildErrorFile))
-	stat.AddOutput(status.NewCriticalPath(log))
+	stat.AddOutput(status.NewCriticalPathLogger(log, buildCtx.CriticalPath))
 	stat.AddOutput(status.NewBuildProgressLog(log, filepath.Join(logsDir, logsPrefix+"build_progress.pb")))
 
 	buildCtx.Verbosef("Detected %.3v GB total RAM", float32(config.TotalRAM())/(1024*1024*1024))