Move TrafficStats tags for the network stack constants

As per API council feedback, these constants should live in
a place that is private to the network stack, only with a
range defined in system API.

Bug: 129433383
Test: m
Change-Id: I84a90f84a9af6fef4667ee4d512ebd0413222086
Merged-In: I4882686a86e7c6d42f4b0619b921d02619ed6d4c
Merged-In: I9b648ed6c687d56db61a54570c7880c51c1bae51
diff --git a/Android.bp b/Android.bp
index 523e356..ec8636d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -842,6 +842,7 @@
         "core/java/com/android/internal/util/RingBufferIndices.java",
         "core/java/com/android/internal/util/State.java",
         "core/java/com/android/internal/util/StateMachine.java",
+        "core/java/com/android/internal/util/TrafficStatsConstants.java",
         "core/java/com/android/internal/util/WakeupMessage.java",
         "core/java/android/net/shared/*.java",
     ]