Ignore uncaught errors from ChromeVox
Ignore uncaught errors from ChromeVox

ChromeVox (screenreader) always throws an error as of Chrome 73.
Screen these out since they are unrelated to our application and we
can't control them.

Closes #1862

Change-Id: Ib0c9e913489c0945d652cd37d029160411149715

shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player