Android demo app tutorial fix for XNNPACK and QNN (#2962)

[kirklandsign]

Summary:

• Update tutorial due to recent changes.
• Clean up setup.sh for app helper lib build.

Pull Request resolved: #2962

Reviewed By: cccclai

Differential Revision: D55951189

Pulled By: kirklandsign

fbshipit-source-id: 2c95e8580145b039f503e7cd99a4003867f8dbb0 (cherry picked from commit 26365f1)

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3027

• 📄 Preview Python docs built from this PR

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

❌ 2 New Failures

As of commit b8ac57b with merge base d3326a2 ():

NEW FAILURES - The following jobs have failed:

• Apple / upload-frameworks-ios (gh)
  Credentials could not be loaded, please check your action inputs: Could not load credentials from any providers
• pull / test-models-linux (cmake, llava_encoder, portable, linux.4xlarge, 90) / linux-job (gh)
  RuntimeError: Command docker exec -t f14c5bb979be9f231545a092a36a08c519dbfc2d3d5df3b0ee9b9b50e4683774 /exec failed with exit code 1

This comment was automatically generated by Dr. CI and updates every 15 minutes.