Refine OEMCrypto Mock Logging

Merge from Widevine repo of http://go/wvgerrit/24727

This separates out the logging of decrypt calls from all other calls.
This is useful because we sometimes want to trace all the calls in a
license request, but we don't want logging of decrypt calls which
would slow down playback.

b/37353534
b/35141278

Change-Id: I3f172c02778d86e66d0e1f90344a34c4d3b15a9e

libwvdrmengine/oemcrypto/mock/test/oemcrypto_logging_test.cpp

@@ -111,6 +111,7 @@ TEST_F(OEMCryptoLoggingTest, TestChangeLoggingCategories) {
   ASSERT_TRUE(LogCategoryEnabled(kLoggingTraceNonce));
   ASSERT_TRUE(LogCategoryEnabled(kLoggingTraceDecryption));
   ASSERT_TRUE(LogCategoryEnabled(kLoggingTraceUsageTable));
+  ASSERT_TRUE(LogCategoryEnabled(kLoggingTraceDecryptCalls));
   ASSERT_TRUE(LogCategoryEnabled(kLoggingDumpTraceAll));
 
   RemoveLoggingForCategories(kLoggingDumpKeyControlBlocks);