Add env var for producer/consumer socket.

Bug: 76169489
Change-Id: I952baff9aeeb0e68fc203cc9abf4749c6bdd09a6
diff --git a/Android.bp b/Android.bp
index 92426f0..e8c900f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -177,6 +177,7 @@
     "src/tracing/core/trace_packet.cc",
     "src/tracing/core/trace_writer_impl.cc",
     "src/tracing/ipc/consumer/consumer_ipc_client_impl.cc",
+    "src/tracing/ipc/default_socket.cc",
     "src/tracing/ipc/posix_shared_memory.cc",
   ],
   shared_libs: [
@@ -3181,6 +3182,7 @@
     "src/tracing/core/trace_packet.cc",
     "src/tracing/core/trace_writer_impl.cc",
     "src/tracing/ipc/consumer/consumer_ipc_client_impl.cc",
+    "src/tracing/ipc/default_socket.cc",
     "src/tracing/ipc/posix_shared_memory.cc",
     "src/tracing/ipc/producer/producer_ipc_client_impl.cc",
     "src/tracing/ipc/service/consumer_ipc_service.cc",
@@ -3418,6 +3420,7 @@
     "src/tracing/core/trace_writer_impl.cc",
     "src/tracing/core/trace_writer_impl_unittest.cc",
     "src/tracing/ipc/consumer/consumer_ipc_client_impl.cc",
+    "src/tracing/ipc/default_socket.cc",
     "src/tracing/ipc/posix_shared_memory.cc",
     "src/tracing/ipc/posix_shared_memory_unittest.cc",
     "src/tracing/test/aligned_buffer_test.cc",