Java 9: use Factory Methods to Create Immutable Collections

[Zhiyuan-Amos]

We can convert method calls like Arrays#asList(...) to use List#of(...). https://dzone.com/articles/java-9-factory-methods-to-create-immutable-collect

As this is likely to be a mechanical change, do take note to list down the steps that you've taken to resolve this issue. Refer to our coding conventions for more details.