bpf_progs - eliminate netd.c dependency on UidConstants.h

Per Lorenzo's request on:
  https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2123888



Bug: 235778483
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Id464fc2418efcb3764fae2a25c11fdda4439f411