Adding multi-camera for the side grayscale fisheye lens and multi-user training support on the Aria glasses

[AntonioMacaronio]

Background

• Currently the data processing for process_project_aria.py only works for the main camera, and only supports 1 user. Since the Aria glasses can sync multiple users by timestamp with the same point of reference for MPS, it is a nice functionality to support.

Changes

• Adding data-processing support for the grayscale images on the side of Aria Glasses
• Adding dual user data-processing support if datasets from 2 users are available (synced by a common point of reference)
• Orientate the aria images to be right side up inside of sideways, and update the camera calibration parameters as well