[PWA] Use passive event listeners for touch events when possible
[PWA] Use passive event listeners for touch events when possible

Reported by Lighthouse.

Issue #905

Change-Id: Ife3c7fe8401b2fb26e78f237144a9baf327e869e

vimond/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player