build: fix build with --disable-video

src/call.cpp

src/call.h

src/client/Makefile.am

src/client/callmanager.cpp

src/client/videomanager.cpp

src/client/videomanager.h

src/conference.cpp

src/conference.h

src/jami/videomanager_interface.h

src/manager.cpp

src/manager.h

src/media/localrecorder.cpp

src/media/localrecorder.h

src/media/media_decoder.cpp

src/media/media_decoder.h

src/media/media_encoder.cpp

src/media/media_encoder.h

src/media/media_filter.cpp

src/media/media_player.cpp

src/media/media_player.h