We now truncate Session method paths and IDs based on the Logging level to improve Session Logging readability in logcat. If another external session is started off of an existing external Session, the preceding histories are replaced with "..." so that the Session information is not overwhelming. Bug: 26571395 Test: Unit Tests and manual tests pass Change-Id: I9ffda3d64f1072fa6228a82a86116a5e47d18c96