Merge from Widevine repo of http://go/wvgerrit/95483
This adds a log message to the oemcrypto unit tests so that if
somebody sends us a log, we can tell which version they are
running.
With this CL, the version string is
OEMCrypto unit tests for API 16.2. Tests last updated 2020-03-18
This can be found in the logs and in stdout when running the unit test
OEMCryptoClientTest.VersionNumber. One can verify the executable on
android using
strings $OUT/data/nativetest/oemcrypto_test | grep -i "oemcrypto unit tests"
Test: ran oemcrypto_test and verified version string
Bug: 144713981
Change-Id: Ie10b2f270b783ed10a3ff9855b7ca32a5327ea1c
88934aa322