fix R8 warning (#27291)
fix R8 warning (#27291)

Summary:
R8 shows warning that **com.facebook.react.bridge.JavaScriptModule**, **com.facebook.react.bridge.NativeModule** are interfaces so proguard rules must use implements instead of extends. This PR changes proguard rules to fix the warnings.

## Changelog

[Android] [Changed] - Fix R8 warning
Pull Request resolved: https://github.com/facebook/react-native/pull/27291

Test Plan: RNTester builds and runs as expected.

Differential Revision: D18658704

Pulled By: mdvacca

fbshipit-source-id: a679643542bc55b89141f58c3236a29cf83c20d2

javache/react-native,facebook/react-native,javache/react-native,hammerandchisel/react-native,facebook/react-native,exponent/react-native,exponentjs/react-native,facebook/react-native,pandiaraj44/react-native,exponentjs/react-native,hammerandchisel/react-native,exponentjs/react-native,exponent/react-native,pandiaraj44/react-native,javache/react-native,exponent/react-native,hoangpham95/react-native,facebook/react-native,arthuralee/react-native,javache/react-native,exponent/react-native,hammerandchisel/react-native,myntra/react-native,pandiaraj44/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,exponentjs/react-native,janicduplessis/react-native,janicduplessis/react-native,pandiaraj44/react-native,exponentjs/react-native,pandiaraj44/react-native,myntra/react-native,javache/react-native,hoangpham95/react-native,hoangpham95/react-native,javache/react-native,hammerandchisel/react-native,hoangpham95/react-native,exponent/react-native,hammerandchisel/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,myntra/react-native,hoangpham95/react-native,facebook/react-native,pandiaraj44/react-native,janicduplessis/react-native,arthuralee/react-native,exponentjs/react-native,exponentjs/react-native,hoangpham95/react-native,hammerandchisel/react-native,exponent/react-native,arthuralee/react-native,myntra/react-native,pandiaraj44/react-native,facebook/react-native,pandiaraj44/react-native,arthuralee/react-native,exponentjs/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,javache/react-native,arthuralee/react-native,hammerandchisel/react-native,hammerandchisel/react-native,exponent/react-native,exponent/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,hoangpham95/react-native,hoangpham95/react-native,javache/react-native,myntra/react-native