[NETD-BPF#15] Move BPF map definition and utils to frameworks/libs/net/ am: 35ffa1a5e4

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1870234

Change-Id: I5f09295b7587085a6026135a4568b7fbc58ad944
tree: 7a9558e413952f6bd971c3382fe24a30e95f8eb6
  1. staticlibs/