Fixes for build failures in macOS and Android
Follow up MR for the CI failures in !1420 (merged)
- threadshare: net: correct the member name in ip_mreq, missed changing to
ifr_interface
after switching to the libc crate (addresses https://gitlab.freedesktop.org/gstreamer/cerbero/-/jobs/66569333) - threadshare: udp: avoid getifaddrs in android until the issue https://github.com/mmastrac/getifaddrs/issues/5 is fixed (addresses https://gitlab.freedesktop.org/gstreamer/cerbero/-/jobs/66569330)