Unbundle: Remove the use of internal SSL APIs.

1. Replaced SSLContextImpl with SSLContext with TLS.  (They're the same, according to crazybob)
2. Copied SSLSocketFactory from org.apache.http.conn.ssl, so that we can use the hidden costructor.  (Which wasn't in the original code -- it was added by the android team, which is why it's hidden.)
2 files changed