Use built-in key debugging mechanism
Use built-in key debugging mechanism

When debugging a network flow it's useful to log the negotiated keys to
see what is happening inside the session. Previously this was
implemented in Conscrypt, but BoringSSL has this capability built-in
now.

Documentation at
https://commondatastorage.googleapis.com/chromium-boringssl-docs/ssl.h.html#SSL_CTX_set_keylog_callback

Test:
    vogar --mode host \
    --classpath out/host/common/obj/JAVA_LIBRARIES/core-tests-support-hostdex_intermediates/classes.jack \
    --classpath out/host/common/obj/JAVA_LIBRARIES/core-tests-hostdex_intermediates/classes.jack \
    libcore/luni/src/test/java/libcore/javax/net/ssl/*Test.java

Change-Id: I50a5b315d302492667a28926161836e34b9dd357

google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt