Change definition of live for default startTime
Change definition of live for default startTime

We will now default start time to the end of the seekable range only
if the duration is infinite.  This fixes playback of static, VOD
assets with availabilityStartTime.

Change-Id: I9f511678f767375d41d98260cc519dc84566538b

tvoli/shaka-player,cmgrecu/shaka-player,TobbeEdgeware/shaka-player,Ross-cz/shaka-player,brightcove/shaka-player,tvoli/shaka-player,indiereign/shaka-player,baconz/shaka-player,TheModMaker/shaka-player,ustudio/shaka-player,russitto/shaka-player,vimond/shaka-player,tvoli/shaka-player,cmgrecu/shaka-player,shaka-project/shaka-player,baconz/shaka-player,ustudio/shaka-player,tvoli/shaka-player,indiereign/shaka-player,russitto/shaka-player,shaka-project/shaka-player,ustudio/shaka-player,TheModMaker/shaka-player,russitto/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,indiereign/shaka-player,TheModMaker/shaka-player,baconz/shaka-player,brightcove/shaka-player,TobbeEdgeware/shaka-player,ustudio/shaka-player,Ross-cz/shaka-player,cmgrecu/shaka-player,vimond/shaka-player,Ross-cz/shaka-player,TobbeEdgeware/shaka-player,brightcove/shaka-player