Compute token_stats in aom_write_bit_record() function.
Compute token_stats in aom_write_bit_record() function.

The RD_DEBUG experiment computes stats in the _record() functions which
 then proxy calls through to the actual bit writer.
The aom_write_bit_record() should proxy calls through to aom_write_bit()
 instead of aom_write() with probability 128.

Change-Id: I7617fad0f2c25dc05cf111c660a90068c3f4c513

luctrudeau/aom,luctrudeau/aom,smarter/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,smarter/aom,smarter/aom,GrokImageCompression/aom,luctrudeau/aom,luctrudeau/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,smarter/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom