[NORMATIVE] Error resilience overrules refs signaling
[NORMATIVE] Error resilience overrules refs signaling

For FRAME_REFS_SIGNALING, when error resilience mode is on for inter
frames, no frame refs signaling options will be provided. Hence no
additional bit is added and the reference frame signaling stays the
same as baseline.

BUG=aomedia:1392

Change-Id: I8ff9688c278373acaae3ee4fb74e9a392132f54d

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