Refine VP8 encode middlerware.

BZ: 135380

Remove ref frame alignment calculation due to driver will do that instead;
Add setconfig/getconfig for VP8 ref frame selection.

Change-Id: Idaa01959e5b47a8b0f9d01a7b4d2eab10cca3bf3
Signed-off-by: Liu Bolun <bolun.liu@intel.com>
Reviewed-on: http://android.intel.com:8080/134059
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: cactus <cactus@intel.com>
Tested-by: cactus <cactus@intel.com>
5 files changed