Codegen tests on Android

This module runs codegen box tests (compiler/testData/codegen/box) on Android. It does so by compiling all of tests, except the excluded ones, in one big Android project and running it as an app on an emulator, which is downloaded during the first run of the tests. See which tests are excluded in CodegenTestsOnAndroidGenerator, but mainly those are the ones annotated with // IGNORE_BACKEND: ANDROID, those having Java source files, or using advanced Kotlin/JVM features.

Run the tests via Gradle:

./gradlew :compiler:android-tests:test

Make sure your JAVA_HOME points to a JDK 1.8 installation, otherwise, you'll get an exception, such as java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema.