Add Android project example to README

Author: sksamuel

README.md

@@ -11,3 +11,4 @@ This repo contains multiple examples of how to use Kotest.
 * [Spring Webflux](./kotest-spring-webflux)  — example of a JVM project using Spring Webflux
 * [Allure](./kotest-allure)  — example of a JVM project using Allure test reporting
 * [WasmJS](./kotest-wasm)  — example of a WasmJS project
+* [Android](./kotest-android)  — example of an Android project