Make image and audio variables const references

[larryliu0820]

Bind the result of get_image() and get_audio() to const ref to avoid copy.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14999

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❌ 3 New Failures, 1 Pending, 2 Unrelated Failures

As of commit 6129b96 with merge base 3591604 ():

NEW FAILURES - The following jobs have failed:

• pull / test-qnn-wheel-packages-linux (3.10) / linux-job (gh)
  RuntimeError: Command docker exec -t 1225f8f1b83517fd5e179e787d9ab95945889dde8ec1ad0cf9b254738eaa6fca /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command docker exec -t b281155bc222e58df8088b336baf9836c12b6b55326d262c7430952bf761a0c2 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command docker exec -t 67298685f41ed6161364491ccb136281502ec28327521ea7254a5575b295a679 /exec failed with exit code 1

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

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

• pull / unittest / windows / windows-job (gh) (trunk failure)
  Process completed with exit code 1.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  Process completed with exit code 1.

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[larryliu0820]

@pytorchbot cherry-pick --onto release/1.0 -c critical

[pytorchbot]

Cherry picking #14999

The cherry pick PR is at #15009 and it is recommended to link a critical cherry pick PR with an issue. The following tracker issues are updated:

• [v1.0.0] Release Tracker #14288 (comment)

Details for Dev Infra team

Raised by workflow job