Fix QNN AAR

[kirklandsign]

Summary

Test plan

CI

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16303

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 913c77e with merge base 43a32eb ():

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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[Copilot]

Pull request overview

This PR fixes the QNN (Qualcomm Neural Network) Android AAR build by correcting the library path and fixing the QNN Runner constructor call.

• Updates QNN shared library path to match new CMake output directory structure
• Fixes QNN Runner instantiation by adding missing constructor parameter and adjusting variable scope

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
scripts/build_android_library.sh	Updates the QNN library copy path to reflect the new CMake output structure with executorch/backends/qualcomm/ subdirectory
extension/android/jni/jni_layer_llama.cpp	Moves data_files_vector declaration to broader scope and adds missing performance_output_path parameter to QNN Runner constructor

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