Unify log level for tests

Merge from Widevine repo of http://go/wvgerrit/79463 and
http://go/wvgerrit/82383

Several tests explicitly set the log level. This CL unifies that a
little bit. When running the unit tests by hand, on android or for ce
cdm, the log level is 0 (ERROR) and can be incremented on the command
line using the "--verbose" switch.

When running on the desktop, you can set the environment variable
VERBOSE_LOG to "yes", and the log level is set to VERBOSE.  This is
done by the buildbot so you can see full logs in the build archive.

When running with the test bed (i.e. Mod Mock) you can edit the
options.txt file and set log_level to 0=ERROR up to 4=VERBOSE. if you
are using the run_current_tests script, you can create a file in the
linux directory called override_options.txt and add the line
log_level 4

This CL only changes test code.

bug: 124390006
Test: unit tests
Change-Id: I1e042004692750e218b8c4220bce3ec1e387004e

libwvdrmengine/oemcrypto/test/oemcrypto_test.cpp

@@ -130,7 +130,6 @@ class OEMCryptoClientTest : public ::testing::Test, public SessionUtil {
 
   void SetUp() override {
     ::testing::Test::SetUp();
-    wvcdm::g_cutoff = wvcdm::LOG_INFO;
     const ::testing::TestInfo* const test_info =
         ::testing::UnitTest::GetInstance()->current_test_info();
     LOGD("Running test %s.%s", test_info->test_case_name(), test_info->name());