onnxruntime

Revert "[js/rn] support load model from buffer on Android (#12676)" (#13903)

### Description
<!-- Describe your changes. -->

As title.

This pr is missing an un-updated index.android.gradle, which causing an
unstable e2e unit test run for React Native CI.

Revert the changes for now.

### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

To unblock Ort React Native CI pipeline failure.