Android Lollipop implementation reports this innaccurately during handshaking, which was causing SSL setup to fail. Now derives the information directly from ByteBuffer positions. This change is based on a similar change for Jetty at https://gist.github.com/tavianator/96e9daab0fd1a45f11f2/8cbbfe028c97cac63d3b39f575b2c317d7a174c2 Test-information: Tested Harrier with IMAPS and STARTTLS against MBox on Android 4.4 and 5.0 emulators, all connect and authenticate OK. Tested MLC on Linux, with extra debugging added - everything works, and the values returned for "lastConsumed" are the same as those returned by "bytesConsumed()" so the change appears to make no difference to behaviour for non-Android Ran unit tests - no failures. Change-Id: I54b3850136b35535918b0eb303409232d64a60b5 Reviewer: Nick Hudson <nick.hudson@isode.com>