message: Add F16 as type for the literal conversion functions
diff: @@ -839,6 +839,7 @@ StatusOr<std::unique_ptr<Literal>> ConvertIfDestTypeMatches(
  CONVERT_IF_TYPES_MATCH(U8)
  CONVERT_IF_TYPES_MATCH(U32)
  CONVERT_IF_TYPES_MATCH(U64)
  + CONVERT_IF_TYPES_MATCH(F16)
  CONVERT_IF_TYPES_MATCH(F32)
  CONVERT_IF_TYPES_MATCH(F64)
  #undef CONVERT_IF_TYPES_MATCH
  @@ -865,6 +866,7 @@ StatusOr<std::unique_ptr<Literal>> Literal::Convert(
  CONVERT_IF_DEST_TYPE_MATCHES(U8)
  CONVERT_IF_DEST_TYPE_MATCHES(U32)
  CONVERT_IF_DEST_TYPE_MATCHES(U64)
  + CONVERT_IF_DEST_TYPE_MATCHES(F16)
  CONVERT_IF_DEST_TYPE_MATCHES(F32)
  CONVERT_IF_DEST_TYPE_MATCHES(F64)
  #undef CONVERT_IF_DEST_TYPE_MATCHES
  