Fix test scheme plugin
Fix test scheme plugin

It's not clear how this mistake went undetected, but the build bot
passed it.  Without this fix, plenty of tests are failing.

Change-Id: I576e079b4f997cb2c89ca3ba4484312d42c7541d

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