Dont delete UID from BpfMap on BPF-less kernel

Change-Id: I93b5b8237f6655cb47e0b0584c54cad73a51e7b2
Signed-off-by: Dmitrii <bankersenator@gmail.com>
Signed-off-by: Jis G Jacob <studiokeys@blissroms.org>
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 2c9f30c..40c214e 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -2450,6 +2450,7 @@
      * @param uid
      */
     private void deleteKernelTagData(int uid) {
+        if(mCookieTagMap == null) return;
         try {
             mCookieTagMap.forEach((key, value) -> {
                 // If SkDestroyListener deletes the socket tag while this code is running,