Uses the same workaround as whitebox for compatibility with v16.4 and older servers.
Test: Locally built in Trusty repo, installed on prod device with DPM, ran custom Exoplayer demo with license server URL replaced with 1642 endpoint.
PiperOrigin-RevId: 639882556
Merged from https://widevine-internal-review.googlesource.com/199870
Change-Id: I1669acc3ddae1bb3726bacd0de2f72aca75c9e97
(cherry picked from commit 5f7cd33f9869825bb17992840483807cae83ad24)