Change navigation tracing config for slow reports.

Adds categories useful for debugging Android traces.

Change-Id: I75cc0ed406f3e3b40fd21106c1e54f7c5a4b0897
Reviewed-on: https://chromium-review.googlesource.com/c/1352229Reviewed-by: Etienne Bergeron <etienneb@chromium.org>
Commit-Queue: ssid <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611820}

content/browser/tracing/background_tracing_manager_impl.cc

@@ -692,7 +692,7 @@ TraceConfig BackgroundTracingManagerImpl::GetConfigForCategoryPreset(
     case BackgroundTracingConfigImpl::CategoryPreset::BENCHMARK_NAVIGATION: {
       auto config = TraceConfig(
           "benchmark,toplevel,ipc,base,browser,navigation,omnibox,ui,shutdown,"
-          "safe_browsing,"
+          "safe_browsing,Java,EarlyJava,loading,startup,"
           "disabled-by-default-system_stats,disabled-by-default-cpu_profiler",
           record_mode);
       // Filter only browser process events.