Fix binary incompatibility with Android Gradle plugin 3.2.0-alpha06

Remove a non-reflective usage of the ResourceSet class, which has been
moved to a different package between versions. Access it through
reflection instead. This is a workaround. We can introduce a proper
fix once we have a public API in the Android plugin.

The test case that could detect the compatibility issue is
`testAndroidExtensionsManyVariants` (it uses experimental Android
extensions), but we did not run it with 3.2.0-alpha6. This commit
adds a test class with the same tests for 3.2.0-alpha6.

Issue #KT-23192 Fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/AbstractKotlinAndroidGradleTests.kt

@@ -13,7 +13,15 @@ import java.io.File
 class KotlinAndroidGradleIT : AbstractKotlinAndroidGradleTests(gradleVersion = GradleVersionRequired.AtLeast("3.4"), androidGradlePluginVersion = "2.3.0")
 class KotlinAndroidWithJackGradleIT : AbstractKotlinAndroidWithJackGradleTests(androidGradlePluginVersion = "2.3.+")
 
-class KotlinAndroid30GradleIT : AbstractKotlinAndroidGradleTests(gradleVersion = GradleVersionRequired.AtLeast("4.1"), androidGradlePluginVersion = "3.0.0-beta1") {
+// TODO If we there is a way to fetch the latest Android plugin version, test against the latest version
+class KotlinAndroid32GradleIT : KotlinAndroid3GradleIT(GradleVersionRequired.AtLeast("4.5"), "3.2.0-alpha06")
+
+class KotlinAndroid30GradleIT : KotlinAndroid3GradleIT(GradleVersionRequired.AtLeast("4.1"), "3.0.0")
+
+abstract class KotlinAndroid3GradleIT(
+    gradleVersionRequired: GradleVersionRequired,
+    androidGradlePluginVersion: String
+) : AbstractKotlinAndroidGradleTests(gradleVersionRequired, androidGradlePluginVersion) {
 
     @Test
     fun testApplyWithFeaturePlugin() {
@@ -314,5 +322,4 @@ abstract class AbstractKotlinAndroidWithJackGradleTests(
             assertContains("Kotlin Gradle plugin does not support the deprecated Jack toolchain")
         }
     }
-}
-
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidProject/build.gradle

@@ -13,7 +13,7 @@ buildscript {
 allprojects {
     repositories {
         mavenLocal()
-        mavenCentral()
+        jcenter()
         maven { url 'https://maven.google.com' }
     }
 }