Add a view for Network Trace Packets

This simplifies the access to the args, track name details, and defaults
(such as the packet count).

Test: ui/run-dev-server and query metric
Change-Id: I5b148dce3d40d33082206916b735907b48986cb5
diff --git a/BUILD b/BUILD
index a0fcf69..40eb003 100644
--- a/BUILD
+++ b/BUILD
@@ -2168,6 +2168,7 @@
         "src/trace_processor/stdlib/android/battery_stats.sql",
         "src/trace_processor/stdlib/android/binder.sql",
         "src/trace_processor/stdlib/android/monitor_contention.sql",
+        "src/trace_processor/stdlib/android/network_packets.sql",
         "src/trace_processor/stdlib/android/process_metadata.sql",
         "src/trace_processor/stdlib/android/slices.sql",
     ],