Fix android instrumentation

[kirklandsign]

No description provided.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/10335

• 📄 Preview Python docs built from this PR

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

❌ 1 New Failure, 2 Pending, 1 Unrelated Failure

As of commit f97a0c2 with merge base cc3152b ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for util/python_profiler.py:

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

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

• Build documentation / check-urls (gh) (trunk failure)
  Process completed with exit code 1.

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

[Copilot]

Pull Request Overview

This PR fixes the android instrumentation by updating the signature and handling of the onStats method to work directly with the raw stats string.

• Updated the onStats method signature to accept a JSON string instead of a pre-calculated float value.
• Moved JSON parsing into the onStats method for centralized handling of statistics.

[Copilot]

The empty catch block may hide JSON parsing errors, potentially making debugging more difficult. Consider logging the exception or handling it accordingly.

Suggested change

	} catch (JSONException e) {
	} catch (JSONException e) {
	android.util.Log.e("LlmModuleInstrumentationTest", "Failed to parse JSON stats", e);