Fix two bugs with HTTPS + file uploads.

Firstly, we weren't echoing calls to setFixedLengthStreamingMode
and setChunkedStreamingMode from the HTTPS adapter down to the
real HTTP client.

Secondly, we were calling setTransportIO twice, and the second
call destroyed the buffer of our request body stream. That buffer
has only existed since change Id22a8449118a4b8dd13e71915700ac78803d2d9f,
(November 2, 2010) so the impact of that problem is limited.

Change-Id: Icb0eb2e0ca4e201a629bd74c3b98e852f6cc0fd3
http://code.google.com/p/android/issues/detail?id=12860