ValueTypes: add new java.lang.Class API methods JIT implementation

[tajila]

    public Class<?> asPrimaryType();
    public Class<?> asValueType();
    public boolean isPrimaryType();
    public boolean isValueType(); 
    public boolean isPrimitiveClass()

See #13615

[hangshao0]

A bit update on the APIs: #13615 (comment)

[theresa-m]

These methods have mostly been removed (see #19736). The remaining are:

• Class.isValue
• Class.asNullRestrictedType

[hangshao0]

I don't see Class.asNullRestrictedType here:

https://github.com/ibmruntimes/openj9-openjdk-jdk.valuetypes/blob/openj9/src/java.base/share/classes/java/lang/Class.java

Where did you see that ? If it is gone, this can be closed.

[theresa-m]

You are right. I'll remove it from OpenJ9's Class.java and close this then.