Use SSLSocketFactory instead with manual validation, not to use Android specific classes in this generic Java client

[soygul]

We'll need to manually implement following:

• This help with getting trust manager to work: http://stackoverflow.com/questions/2012497/accepting-a-certificate-for-https-on-android
• We still need SSL session caching with SSLSessionCache
• Hostname verification
• Timeout specification for SSL handshake operations