`Proxy#getInvocationHandler(Object)` throws a `NullPointerException` if the specified argument is `null`. This PR adds the missing `throws` declaration for the NPE.
------------- Commit messages: - 8357597: Add throws declaration for NPE Changes: https://git.openjdk.org/jdk/pull/25419/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25419&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8357597 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/25419.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25419/head:pull/25419 PR: https://git.openjdk.org/jdk/pull/25419