[Search] Call search again if it seems server has more results
[Search] Call search again if it seems server has more results

Also, don't rely on max_items too much: it will be missing or
wrong. The only thing we can rely on is the count of items so far.

Signed-off-by: Jussi Kukkonen <589e25658b1bfd3646cd0c60eea9e9594b5e0b5b@intel.com>

jku/media-service-demo