[CI] pre-commit: auto add license check for Java files

[jbampton]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• No this is a CI update. The PR name follows the format [CI] my subject

What changes were proposed in this PR?

Added another check/hook/test to our pre-commit framework. This hook will auto add a license header to Java files on git commit if they are missing the license. So far all Java files seem to have the correct license so this is just a check to stop regressions and keep the code base standardized. Small piece of automation to auto add missing license headers.

How was this patch tested?

Added the license hook and then ran pre-commit for all files. No Java files were modified. I did test by changing / modifying a Java license and it did fail the hook test locally for that file.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.