HEVC encode API

Signed-off-by: Wang, Ce <ce.wang@intel.com>
Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
(cherry picked from commit 9d128cf241830f7ead49fa5b104248b44c680873)

Conflicts:
	va/Android.mk
	va/Makefile.am
	va/va.h
4 files changed