show JSC removal message on Android (#49709)

Summary:
show build time jsc removal warning. https://github.com/facebook/react-native/issues/49692 but for android

![Screenshot 2025-02-27 at 3 41 43 PM](https://github.com/user-attachments/assets/a4fe6d52-5e05-45b0-a403-c71372dfba06)

## Changelog:

[ANDROID] [CHANGED] - Add a build time JSC lean core warning

Pull Request resolved: https://github.com/facebook/react-native/pull/49709

Test Plan: - test on rn-tester. rn-tester has a jsc build variant. it shows the warning anyway. commenting out `enableHermesOnlyInVariants` will suppress the warning.

Reviewed By: rshest

Differential Revision: D70323283

Pulled By: cortinico

fbshipit-source-id: 632a8b9086c5d90d7f14ea705464356a1292bcad