Fix in forward updates for INTRA modes/partitions

Results:
derfraw300: +0.2

Change-Id: Ie40dc3b31e877ee705f936066d7fa5702bd01ecd
Moving bits from compressed header to uncompressed one.

Bits moved: refresh_frame_flags, active_ref_idx[], ref_frame_sign_bias[],
allow_high_precision_mv, mcomp_filter_type, ref_pred_probs[].

Derf results: +0.040%

Change-Id: I011f43c7eac0371d533b255fd99aee5ed75b85a5
Fix UV intra coding rd loop

This commit makes the coding/reconstruction operations of intra
coding rate-distortion loop for UV components consistent with those
of the encoding process.

key frame coding gains:
derf:   0.11%
stdhd:  0.42%

Change-Id: I8d49f83924a320e3689ef2d60096c49d7f0c7a40
Merge "Fix UV intra coding rd loop" into experimental
Merge "Fix in forward updates for INTRA modes/partitions" into experimental
Merge "Moving bits from compressed header to uncompressed one." into experimental
don't tokenize & encode tokens for blocks in UMV

This avoids encoding tokens for blocks that are entirely
in the UMV border. This changes the bitstream.

Change-Id: I32b4df46ac8a990d0c37cee92fd34f8ddd4fb6c9