/usr/include/ is in libtgvoip-dev 1.0.3-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libtgvoip/
/usr/include/libtgvoip/BlockingQueue.h
/usr/include/libtgvoip/BufferInputStream.h
/usr/include/libtgvoip/BufferOutputStream.h
/usr/include/libtgvoip/BufferPool.h
/usr/include/libtgvoip/CongestionControl.h
/usr/include/libtgvoip/EchoCanceller.h
/usr/include/libtgvoip/JitterBuffer.h
/usr/include/libtgvoip/MediaStreamItf.h
/usr/include/libtgvoip/NetworkSocket.h
/usr/include/libtgvoip/OpusDecoder.h
/usr/include/libtgvoip/OpusEncoder.h
/usr/include/libtgvoip/VoIPController.h
/usr/include/libtgvoip/VoIPServerConfig.h
/usr/include/libtgvoip/audio/
/usr/include/libtgvoip/audio/AudioInput.h
/usr/include/libtgvoip/audio/AudioOutput.h
/usr/include/libtgvoip/audio/Resampler.h
/usr/include/libtgvoip/logging.h
/usr/include/libtgvoip/threading.h