HTML Media Capture Test: capture image with 'environment' facing mode to produce one image file

Clear all camera permissions before running this test. If prompted for permission, please allow.

After hitting the button below, the camera must be launched with viewing the environment mode.

(Note: If the user agent is unable to support the preferred facing mode, it can fall back to the implementation-specific default facing mode.)

Capture an image and then confirm the capturing.

Note: All the actions need to be done in 60 seconds, otherwise it will get TIMEOUT.