fix: potential storage leak in AudioRecorder

[criticalAY]

Purpose / Description

Here I want to addresses concerns regarding the lifecycle and cleanup of temporary recording files. Previously, files created in the cacheDir could persist indefinitely.

Fixes

• Fixes Potential storage leak in audio recording createTempFile #20381

Approach

NA

How Has This Been Tested?

Added Unit tests

Learning (optional, can help others)

NA

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[david-allison]

LGTM

Feel free to squash, better to keep the test and implementation in the same commit