Logging.java currently always tries to load jingle_peerconnection_so in the static section, but some clients don't want to use it. This CL loads jingle_peerconnection_so only when a client requests it by calling one of: * Logging.enableLogThreads * Logging.enableLogTimeStamps * Logging.enableTracing * Logging.enableLogToDebugOutput BUG=b/36410678 Review-Url: https://codereview.webrtc.org/2803203002 Cr-Commit-Position: refs/heads/master@{#17647}