Account for eob cost in the RTC mode decision process
This commit accounts for the transform block end of coefficient flag cost in the RTC mode decision process. This allows a more precise rate estimate. It also turns on the model to block sizes up to 32x32. The test sequences shows about 3% - 5% speed penalty for speed -6. The average compression performance improvement for speed -6 is 1.58% in PSNR. The compression gains for hard clips like jimredvga, mmmoving, and tacomascmv at low bit-rate range are 1.8%, 2.1%, and 3.2%, respectively. Change-Id: Ic2ae211888e25a93979eac56b274c6e5ebcc21fb
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