Fix StreamWriter regression around RGB0/BGR0

[mthrok]

• Add RGB0/BGR0 support to CPU encoder
• Allow to pass RGB/BGR when expectged format is RGB0/BGR0

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/audio/3428

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❌ 5 New Failures

As of commit 3a6173f:

NEW FAILURES - The following jobs have failed:

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

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@mthrok merged this pull request in 9210cba.

[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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