[...] use the same Android Gradle build tools as the top-level project

[brody4hire]

as discussed in: react-native-community/discussions-and-proposals#151

see also:

• Update build.gradle facebook/react-native#25569
• discussion in PR Gradle updates in android.js #24

/cc @SaeedZhiany

[brody4hire]

Taking a different approach as proposed in PR #129