GPlay offline tests were failing due to additional query parameters that were
introduced with b12789275. Additional changes caused offline failures,
as the content pointed to by the test vectors was HD only and did not
allow for offline playback.
This addresses the problem by switching request license tests to point to UAT.
UAT is now the default license server destination for request license tests.
Test vectors for GPlay will be added back as a secondary option when they
are available.
b/13909635
Merge of https://widevine-internal-review.googlesource.com/#/c/10261/
from the widevine cdm repo.
Change-Id: I5e5a2b477b6d591747123e8eeb3cd00b7f762090
4af7ac78a3