Add a template metric for network activity query.

It is often quite useful to see networking aggregated into regions that
indicate whether the interface should be on or off. In the simplest
case, it can be an easier way to view large quantities of instant
network events. In other cases, it can be used to proxy the network for
power or similar analysis.

Test: diff test and ui-dev-server
Change-Id: I0c58b59d082fe8de640f32fa2a65483e9e9a9e0c
diff --git a/Android.bp b/Android.bp
index 344d596..19befb2 100644
--- a/Android.bp
+++ b/Android.bp
@@ -10035,6 +10035,7 @@
         "src/trace_processor/metrics/sql/android/java_heap_histogram.sql",
         "src/trace_processor/metrics/sql/android/java_heap_stats.sql",
         "src/trace_processor/metrics/sql/android/mem_stats_priority_breakdown.sql",
+        "src/trace_processor/metrics/sql/android/network_activity_template.sql",
         "src/trace_processor/metrics/sql/android/p_state.sql",
         "src/trace_processor/metrics/sql/android/power_drain_in_watts.sql",
         "src/trace_processor/metrics/sql/android/power_profile_data.sql",