[NETD-BPF#25] Add bpf_syscall_wrappers visibility for libnetd_mainline am: b2878bf404

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1873735

Change-Id: Ic663a6db9beef33f512a0e1b8b0fcf1ae4d19cc8