Switch message_bridge over to RemoteData from MessageHeader

Just like timestamps, we want to add more data here.  Instead of having
to add that to MessageHeader, switch over to a new message.

Change-Id: I171fde6db0212683dde5bfc9ba7a3700e858dbf0
diff --git a/aos/network/BUILD b/aos/network/BUILD
index 789b093..42e115b 100644
--- a/aos/network/BUILD
+++ b/aos/network/BUILD
@@ -37,6 +37,13 @@
 )
 
 flatbuffer_cc_library(
+    name = "remote_data_fbs",
+    srcs = ["remote_data.fbs"],
+    gen_reflections = 1,
+    target_compatible_with = ["@platforms//os:linux"],
+)
+
+flatbuffer_cc_library(
     name = "timestamp_fbs",
     srcs = ["timestamp.fbs"],
     gen_reflections = 1,
@@ -206,6 +213,7 @@
         ":message_bridge_protocol",
         ":message_bridge_server_fbs",
         ":message_bridge_server_status",
+        ":remote_data_fbs",
         ":remote_message_fbs",
         ":sctp_lib",
         ":sctp_server",
@@ -287,6 +295,7 @@
         ":message_bridge_client_status",
         ":message_bridge_protocol",
         ":message_bridge_server_fbs",
+        ":remote_data_fbs",
         ":remote_message_fbs",
         ":sctp_client",
         ":timestamp_fbs",