[Term Entry] Java ArrayList .isEmpty()

[andersooi]

Description

• Created new term entry for Java ArrayList .isEmpty()

Issue Solved

• Closes #4339

Type of Change

• Adding a new entry

Checklist

• [x] All writings are my own.
• [x] My entry follows the Codecademy Docs style guide.
• [x] My changes generate no new warnings.
• [x] I have performed a self-review of my own writing and code.
• [x] I have checked my entry and corrected any misspellings.
• [x] I have made corresponding changes to the documentation if needed.
• [x] I have confirmed my changes are not being pushed from my forked main branch.
• [x] I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• [x] Under "Development" on the right, I have linked any issues that are relevant to this PR (write "Closes # in the "Description" above).

[Sriparno08]

Hey @andersooi, please make the suggested changes so that we can review the entry and move on to the second review.

[github-actions[bot]]

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