Add ProGuard rule for hermes (#28571)
Add ProGuard rule for hermes (#28571)

Summary:
This adds a ProGuard for `hermes` rule so it does not have to be added by users manually.
https://github.com/facebook/react-native/issues/28270

## Changelog

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[Android] [Added] - ProGuard rule for hermes
Pull Request resolved: https://github.com/facebook/react-native/pull/28571

Test Plan:
1. Create a project with/without hermes.
2. Enable proguard.

Reviewed By: cpojer

Differential Revision: D20947095

Pulled By: hramos

fbshipit-source-id: 79b166ad2dd060f20041d9f5cfe2f794c754843d

exponentjs/react-native,exponentjs/react-native,exponent/react-native,exponentjs/react-native,exponent/react-native,exponentjs/react-native,exponentjs/react-native,exponent/react-native,exponent/react-native,exponent/react-native,exponent/react-native,exponentjs/react-native,exponent/react-native,exponent/react-native,exponentjs/react-native,exponentjs/react-native