Add sequence (kf) level flag for reference buffer
Allows saving bits when reference buffer is not to be used in cases where error resilience is unimportant. Change-Id: I2ef002a7cce96a158e1e58c2b00f0a6846049fff
Allows saving bits when reference buffer is not to be used in cases where error resilience is unimportant. Change-Id: I2ef002a7cce96a158e1e58c2b00f0a6846049fff