Add client-side support for TLS_FALLBACK_SCSV

Change-Id: Iec479de2549fbbc1e1587663cbe1ff4795176ff2
(cherry picked from commit ee480ef5039d7c561fc66ccf52169ead186f1bea)
Merge remote-tracking branch 'omni/android-4.4' into omni-4.4