Reduce binary size by excluding perfetto consumer

The network trace handler only produces, never consumes Perfetto events.
By cutting out the consumer code, we can reduce the binary size by
~280KB.

Bug: 246985031
Test: build and flash
Change-Id: Ie03129630cc425e1759770ef3f3d3391e78331d7
diff --git a/service-t/native/libs/libnetworkstats/NetworkTraceHandler.cpp b/service-t/native/libs/libnetworkstats/NetworkTraceHandler.cpp
index 4c37b8d..aeadb4a 100644
--- a/service-t/native/libs/libnetworkstats/NetworkTraceHandler.cpp
+++ b/service-t/native/libs/libnetworkstats/NetworkTraceHandler.cpp
@@ -50,6 +50,7 @@
 void NetworkTraceHandler::InitPerfettoTracing() {
   perfetto::TracingInitArgs args = {};
   args.backends |= perfetto::kSystemBackend;
+  args.enable_system_consumer = false;
   perfetto::Tracing::Initialize(args);
   NetworkTraceHandler::RegisterDataSource();
 }