support multi video stream info and add camera cap flags

[tbago]

This PR contain the following features:

• The camera proto video stream info contain more detail about the stream info, so the camera server proto need use the same video stream info define;
• the camera can have multi lens (e.g. one Visible light one Infrared). So need support multi video stream info;
• the camera cap flags is important for clint to check the camera capability;
• unify the camera information int camera and camera server;

[tbago]

The pull request to MAVSDK will come soon