android startup benchmark: trace more categories

Not sure which ones would be more useful for end metrics later, let's
see.

Bug: 760498
Change-Id: I46a878ebf3a65ed164fa8df95b2846ed04cbde83
Reviewed-on: https://chromium-review.googlesource.com/883449
Commit-Queue: Egor Pasko <pasko@chromium.org>
Reviewed-by: Maria Khomenko <mariakhomenko@chromium.org>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531885}

tools/perf/benchmarks/start_with_url.py

@@ -91,7 +91,8 @@ class ExperimentalStartWithUrlCold(perf_benchmark.PerfBenchmark):
   def CreateCoreTimelineBasedMeasurementOptions(self):
     startup_category_filter = (
         chrome_trace_category_filter.ChromeTraceCategoryFilter(
-            filter_string='startup,toplevel,Java,EarlyJava'))
+            filter_string=('loading,net,netlog,network,'
+                'startup,toplevel,Java,EarlyJava')))
     options = timeline_based_measurement.Options(
         overhead_level=startup_category_filter)
     options.config.enable_chrome_trace = True