test: Fix Xbox DRM tests (#4694)
test: Fix Xbox DRM tests (#4694)

Since we ended up with a different default config on Xbox, the tests for
DRM broke. That went unnoticed because Xbox is offline in our lab. The
issue was discovered while working to restore that platform in the lab
test runs.
shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player