Convert ReactAndroid/hermes-engine/build.gradle to Kotlin DSL (#41830)

Summary:
Pull Request resolved: #41830

Moving another Gradle file from Groovy to Kotlin DSL

Changelog:
[Internal] [Changed] - Convert ReactAndroid/hermes-engine/build.gradle to Kotlin DSL

Reviewed By: dmytrorykun

Differential Revision: D51890226

fbshipit-source-id: 989c4b1ca053718a9d9e1b45d1230c9729685724

Author: cortinico