message: Added the Add* function for the missing  Builtin operator Fill
diff: @@ -223,6 +223,11 @@ class MicroMutableOpResolver : public MicroOpResolver {
  ParseExpandDims);
  }
  + TfLiteStatus AddFill() {
  + return AddBuiltin(BuiltinOperator_FILL,
  + tflite::Register_FILL(), ParseFill);
  + }
  +
  TfLiteStatus AddFloor() {
  return AddBuiltin(BuiltinOperator_FLOOR,
  tflite::ops::micro::Register_FLOOR(), ParseFloor);
  