Decrease constraints min value if applying the default ones failed
Decrease constraints min value if applying the default ones failed

In some cases the constraints may not be applied not due to some strange
browser behaviour, but because the hardware is not capable to deliver
the minimum constraints requested. In those cases the minimum values are
progressively decreased until an acceptable constraint is found.

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed