/usr/include/ is in libfarstream-0.2-dev 0.2.8-4.1~build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/farstream-0.2/
/usr/include/farstream-0.2/farstream/
/usr/include/farstream-0.2/farstream/fs-candidate.h
/usr/include/farstream-0.2/farstream/fs-codec.h
/usr/include/farstream-0.2/farstream/fs-conference.h
/usr/include/farstream-0.2/farstream/fs-element-added-notifier.h
/usr/include/farstream-0.2/farstream/fs-enumtypes.h
/usr/include/farstream-0.2/farstream/fs-participant.h
/usr/include/farstream-0.2/farstream/fs-plugin.h
/usr/include/farstream-0.2/farstream/fs-rtp.h
/usr/include/farstream-0.2/farstream/fs-session.h
/usr/include/farstream-0.2/farstream/fs-stream-transmitter.h
/usr/include/farstream-0.2/farstream/fs-stream.h
/usr/include/farstream-0.2/farstream/fs-transmitter.h
/usr/include/farstream-0.2/farstream/fs-utils.h