Use try-with-resources for some streams

[TacoTheDank]

Description

• Use try-with-resources for some streams per a SpotBugs suggestion. (I want to update the SpotBugs plugin to the latest version, and this is part of it.)

Checklist

• I have read the contribution guidelines: https://github.com/AntennaPod/AntennaPod/blob/develop/CONTRIBUTING.md#submit-a-pull-request
• I have performed a self-review of my code
• My code follows the style guidelines of the AntennaPod project: https://github.com/AntennaPod/AntennaPod/wiki/Code-style
• I have mentioned the corresponding issue and the relevant keyword (e.g., "Closes: #xy") in the description (see https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
• If it is a core feature, I have added automated tests

[ByteHamster]

How many changes are needed to support the update?

I think more important than adding new rules would be to fix our violations of the old rules and to re-enable the CI check (see #6941)

[TacoTheDank]

@ByteHamster Luckily the SpotBugs version can be separated from the SpotBugs Gradle Plugin version, so we can update the plugin without needing to update SpotBugs itself, or vice versa (for the most part; newer (5.1.x) SpotBugs-plugin versions drop support for older SpotBugs versions).

[TacoTheDank]

I just remembered this PR isn't actually related to SpotBugs like I thought. Its an old branch from over a year ago I had made and didn't do anything with. This is just using try-with-resources for some streams.

[ByteHamster]

What's the state of this PR?

[github-actions]

This PR will be closed when we don't get a reply within 7 days.