android: Override camera as "Internal" provided found in HAL config

Currently, all UVC cameras are reported with CameraLocationExternal [1]
by libcamera-core since there is no universal information or standard,
to know the location of these cameras. However, in the libcamera HAL
layer, we can make an informed decision whether it's external or
internal, simply by checking its presence in the HAL configuration
file.

The CameraHalManager will now assign the numerical id of the camera
accordingly when initializing the CameraDevice, based on the camera
facing value set in the HAL config file.

[1] 76809320bb1a ("libcamera: pipeline: uvcvideo: Treat all UVC cameras
                   as external")

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

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