Make it easier to create ListValue by adding specific type flavours of ListValue.of method

[aozarov]

e.g. ListValue.of(String..), ListValue.of(double...),...

[ajkannan]

Right now we have this for each value type. Would ListValue.of(String...) add a lot of value?

[aozarov]

Yes, the difference is that such addition would make it easy creating a list independent of an Entity when that is desired.

[aozarov]

On the same note, we could even make ListValue creation easier by also supporting an overloaded
addValue version in the Builder for each of the acceptable types.