Fix cdf declarations for a few symbols
Fix cdf declarations for a few symbols

Should always use AOM_ICDF() macro for compatibility with multiple
symbol coding related experiments.
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Change-Id: Iab2c8f2a1234a36ebd1ec4307079d5344214608b

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom