Use SSL_session_reused to check when a session was reused

The returned session_id could be exactly the same in the case of TLS
session tickets, so use the SSL_session_reused API to determine exactly
when a session was reused.

(cherry picked from commit 1115fa0f6dbbff3a913fbce39ca98f9a78425c72)

Bug: 28751153
Change-Id: Ie82e4d1bb326d7e7deb7981a1e57df393f6c0e1f
