[NETD-BPF#14] Move BPF map definition and utils to frameworks/libs/net/

Move BPF map definition and utilities to a common place that easy to be
referenced from both mainline module and platform code.

Bug: 202086915
Test: m; flash; boot
Test: cd system/netd/ && atest
Test: cd packages/modules/Connectivity && atest
Test: m gpuservice_unittest libtimeinstate_test bpf_module_test
      CtsAppOpsTestCases libbpf_load_test VtsBootconfigTest
      vts_test_binary_bpf_module bpf_benchmark libbpf_load_test
      libbpf_android_test
Change-Id: Ib15cf78c2da97bff835fb406c866676eec77c013
diff --git a/libbpf_android/BpfLoadTest.cpp b/libbpf_android/BpfLoadTest.cpp
index 09cd36c..a058263 100644
--- a/libbpf_android/BpfLoadTest.cpp
+++ b/libbpf_android/BpfLoadTest.cpp
@@ -19,8 +19,8 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <iostream>
-#include "include/bpf/BpfMap.h"
-#include "include/bpf/BpfUtils.h"
+#include "bpf/BpfMap.h"
+#include "bpf/BpfUtils.h"
 #include "include/libbpf_android.h"
 
 using ::testing::Test;