[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
6 files changed
tree: d186c305b3cbe8d1abb992e9fb2ac3381336521b
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. NOTICE
  6. OWNERS
  7. OWNERS_bpf
  8. PREUPLOAD.cfg