The purpose is to gather all webrtc logging in a single place and allow the app to redirect all webrtc logging to a single stream for offline debugging. Moved Logging.java to webrtc/base to be shared by talk/ and modules/. R=glaznev@webrtc.org, henrika@webrtc.org, magjed@webrtc.org, tommi@webrtc.org Review URL: https://codereview.webrtc.org/1335103004 . Cr-Commit-Position: refs/heads/master@{#9959}