message: Don't flag unsupported variant type ops in tensorlist pass
  TensorList pass need not know about all DT_VARIANT uses, so instead just use
  partial conversion. This would still flag/fail if one of the explicitly marked illegal ops are encountered.
diff: @@ -838,7 +838,8 @@ LogicalResult LowerStaticTensorListPass::RewriteFunction(
  // TensorFlow operations that doesn't have operands and results of type
  // variant are legal. Here, we don't distinguish between variants encoding
  // TensorList or some other type as that information is not available here.
  - // This constraint should be relaxed to support other variant types in TFLite.
  + // Partial legalization is used below to still allow ops with variant types
  + // still.
  auto is_legal = [](Operation *op) {
  auto is_not_variant = [](Type ty) {
  return !ty.cast<ShapedType>().getElementType().isa<TF::VariantType>();
  @@ -873,7 +874,7 @@ LogicalResult LowerStaticTensorListPass::RewriteFunction(
  ConvertTensorListPushBack, ConvertTensorListReserve,
  ConvertTensorListSetItem, ConvertTensorListStack,
  ConvertTensorListResize, ConvertWhile>(context);
  - return applyFullConversion(func, target, patterns);
  + return applyPartialConversion(func, target, patterns);
  }
  void LowerStaticTensorListPass::runOnOperation() {
  