Improve touch-screen event handling
Improve touch-screen event handling

For a touch-screen device, touching the video container should show
the controls instead of acting like a click.  When the controls are
shown, a touch acts like a click.

Change-Id: Ie14bd6eb02580de930d74656d47e97e6bd7bb823

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