As a new class for test link handling will be added as a separate test,
it makes no sense to have a generic "MediaDeviceTest" class. Rename it
in "MediaDevicePrintTest", and make it run only printing test.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Add media device test infrastructure and an intial test that
print out the media devices available in the system.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>