Revert "email: add support for Server Name Indication (SNI)"

This reverts commit a7a483144d466d151ab646523a22af47de10bc18.

Bug: 13744933
Change-Id: I68b95dcca20042639d02d3609ad03aaa3eca0353
Merge "Revert "email: add support for Server Name Indication (SNI)""
auto-merger: merge in from aosp/master