Enable the tracingMetric on the system_health.common benchmarks

tools/perf/benchmarks/system_health.py

Index: tools/perf/benchmarks/system_health.py
diff --git a/tools/perf/benchmarks/system_health.py b/tools/perf/benchmarks/system_health.py
index 164a5f98f079d8556843c2a73609f99a86233073..3c66450b4934c1f34adcf24e2e5f5d91c5b30efd 100644
--- a/tools/perf/benchmarks/system_health.py
+++ b/tools/perf/benchmarks/system_health.py
@@ -39,7 +39,11 @@ class _CommonSystemHealthBenchmark(perf_benchmark.PerfBenchmark):
     options.config.chrome_trace_config.category_filter.AddFilterString('rail')
     options.config.enable_battor_trace = True
     options.config.enable_chrome_trace = True
-    options.SetTimelineBasedMetrics(['clockSyncLatencyMetric', 'powerMetric'])
+    options.SetTimelineBasedMetrics([
+        'clockSyncLatencyMetric',
+        'powerMetric',
+        'tracingMetric'
+    ])
     page_cycler_v2.AugmentOptionsForLoadingMetrics(options)
     return options