Enhancement: Add Java code sample for creating a Google Form #1820

Description

On the Google Forms Create a form or quiz guide, there are code samples for creating a form in Python and Node.js, but currently no corresponding Java example.
The goal is to improve coverage and consistency in the programming languages presented as sample examples across the Google Forms API documentation. Adding a Java example would give Java developers a straightforward reference for creating a Google Form using the Forms API.

Proposed Solution

Add a CreateForm Java sample for creating a Google Form, along with corresponding unit tests, following the existing conventions used by other Java snippet modules in this repository.