Set and tweak global matplotlib configuration in tutorials

[mthrok]

• Set global matplotlib rc params
• Fix style check
• Fix and updates FA tutorial plots
• Add av-asr index cars

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/audio/3515

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure, 3 Unrelated Failures

As of commit 743aff0:

NEW FAILURE - The following job has failed:

• build (3.8) (gh)

BROKEN TRUNK - The following jobs failed but were present on the merge base 8497ee9:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• tests (3.10, 11.8) / linux-job (gh)
• tests (3.8, 11.8) / linux-job (gh)
• tests (3.9, 11.8) / linux-job (gh)

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@mthrok merged this pull request in 84b1230.

[github-actions]

Hey @mthrok.
You merged this PR, but labels were not properly added. Please add a primary and secondary label (See https://github.com/pytorch/audio/blob/main/.github/process_commit.py).

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