ClatdController - eBPF - redirect to v4-... interface

This makes the eBPF clat kernel data path nearly identical to the clatd
userspace path.

Test: built and booted on aosp/master aosp_blueline-eng and internal/qt-dev crosshatch-eng
  atest clatd_test libbpf_android_test libnetdbpf_test netd_integration_test netd_unit_test netdutils_test resolv_integration_test resolv_unit_test

Bug: 65674744
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ic30d16896a77a27a23a1a9e28623039fd787d2d5