GetCameraCapabilitiesTool
Enumerates the device's cameras via Camera2 CameraManager, reporting each camera's id, lens facing, flash availability, and maximum JPEG output resolution. Querying characteristics needs no runtime permission; requires camera hardware (the manifest marks the camera feature non-required).
Result keys: cameras (list of maps with id, facing (front/back/external/unknown), flash_available, max_resolution like "4032x3024"), count.