FEC-1866 #comment Fix freezing after initial seek #time 1.5d

Fix issue where seeking before first play would result in hanging
player with spinner.
We should refactor the code to accommodate the common handling of seek
logic for Native/KPlayer/SLPlayer - as they share a lot of logic, but
currently it isn’y possible to refactor due to Native player code
complexity.
Merge pull request #920 from kaltura/FEC-1866

FEC-1866 #comment Fix freezing after initial seek #time 1.5d