Turn off verbose logging

This CL turns off the verbose logging if LOG_NDEBUG is 1, or if NDEBUG
is defined.  You can set the environment variable LOG_NDEBUG to 0 to
turn on verbose debugging for the CDM library on android.

Also, as in b/9672657, some applications call SelectKey when switching
between video and audio, which is much too verbose and affects
playback.  I have removed the log statements for SelectKey.

bug: 9672657

Change-Id: I635b997118996871356f7126852b4744fb05e810

libwvdrmengine/cdm/core/src/crypto_session.cpp

@@ -433,12 +433,10 @@ bool CryptoSession::RefreshKeys(const std::string& message,
 }
 
 bool CryptoSession::SelectKey(const std::string& key_id) {
-  LOGV("CryptoSession::SelectKey: Lock");
   AutoLock auto_lock(crypto_lock_);
   const uint8_t* key_id_string =
       reinterpret_cast<const uint8_t*>(key_id.data());
 
-  LOGV("SelectKey: id=%ld", static_cast<uint32_t>(oec_session_id_));
   OEMCryptoResult sts =
       OEMCrypto_SelectKey(oec_session_id_, key_id_string, key_id.size());
   if (OEMCrypto_SUCCESS != sts) {