Fix android build

[kirklandsign]

Summary

Fix android build

Test plan

CI

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/17126

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❌ 3 New Failures, 1 Pending, 1 Unrelated Failure

As of commit dc76815 with merge base 409257f ():

NEW FAILURES - The following jobs have failed:

• Build Presets / zephyr (zephyr) / build (gh)
• pull / unittest-buck / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 294f5ff37b4249629d6113adb4ddd6d896cd4f33eb60305a1eb0afcda9154e82 /exec failed with exit code 3
• Test CUDA Builds / test-model-cuda-e2e (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t a82623c011e06c9bee09c5236a03d0191d65820fc895b12b78cb3d7c48c69d93 /exec failed with exit code 1

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

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

• pull / unittest-buck / macos / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3

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[Copilot]

Pull request overview

Fixes an Android build break in the Java LLM wrapper by updating a generate(...) overload to call the correct native method signature.

Changes:

• Update generate(String, int, LlmCallback, boolean) to pass default BOS/EOS arguments so it matches the 7-parameter native generate(...) signature.
• Minor formatting adjustment to the initHybrid(...) call assignment.

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