build/cmake: add unit tests

CMakeLists.txt

src/account.h

src/call.h

src/client/videomanager.h

src/conference.h

src/connectivity/sip_utils.h

src/manager.h

src/media/audio/audio-processing/audio_processor.h

src/media/audio/audio_frame_resizer.h

src/media/audio/audio_input.h

src/media/audio/audio_receive_thread.h

src/media/audio/audio_rtp_session.h

src/media/audio/audiobuffer.h

src/media/audio/resampler.h

src/media/video/video_input.h

src/media/video/video_receive_thread.h

src/sip/sdp.h

src/sip/sipcall.h

test/unitTest/call/conference.cpp

test/unitTest/ice/ice_sdp_parser.cpp