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