Adjustments to cyclic refresh (aq-mode=3).
Target higher delta-qp for big blocks with zero motion, and for segment#1: avoid 64x64 partition size and force 8x8 tx size. Metrics on RTC set mostly positive: SSIM up by ~4%, PSRN by ~1.5%. Doesn't seem to be any change in speed. Change-Id: I1f68fa3c4f62dab3b90cc58041f05ebb048ae5ac
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