Fix Player integration test
Fix Player integration test

TextDisplayer.isTextVisible() should return false by default.

Change-Id: I610d9f1d8c408fec19b622264a893757b132ded2

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