Support for camera stacking masks in Capture From Camera 360

[ChrisTJie]

Is your feature request related to a problem? Please describe.

1. The Contributing Cameras feature is present in the general Capture From Camera component (not the 360 Camera), but this feature is not available in Capture From Camera 360.
2. Regarding the Contributing Cameras feature of Capture From Camera, the list of options allows for customizing the camera, but it only appears on the component, not in the editor's window. Is this a bug?

Describe the solution you'd like I want to use the Capture From Camera 360 feature, and be able to stack the UI Camera on the main camera.

Describe alternatives you've considered The current temporary solution is not to use stacking, but to directly render all its layers.

Additional context

Originally posted by @ChrisTJie in https://github.com/RenderHeads/UnityPlugin-AVProMovieCapture/issues/157#issuecomment-1643269496