Save bitrate and framerate per temporal layer
Save bitrate and framerate per temporal layer

v2: bitrate and framerate related fields in VAEncSequenceParameterBufferH264
are used for the hightest layer

Signed-off-by: Xiang, Haihao <8d677183e5993577d4fa73a419b76987913292d6@intel.com>
Tested-by: Luo, Focus <67a60d792d98a2b29b26be90b9ff71af3f74913a@intel.com>
Reviewed-by: Zhao Yakui <21bae65ecea50a19bd9d0fef489914760189fd5b@intel.com>

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