[ Merge of http://go/wvgerrit/102108 ]
Several tests that make parallel license requests were disabled due
to a flaky server failure unrelated to CDM code. Most of these tests
are now re-enabled to ensure the multi-threaded license requests is
functional on V16.
These tests remains disabled for L3 due to continued flakiness.
Added a lock around the initialization of the SSL library to prevent
issues with license requests getting garbled.
Bug: 137619348
Test: Linux and Android unit tests
Change-Id: Idffaa6039b2bde12613bb5033af32d1af6704c76
cf6cf5f4e8