DPG IT: Test com.android.kotlin.multiplatform.library with Kotlin Multiplatform (#4359)

Add a simple test for a Android KMP library project.

It's just a simple test without extended KMP targets to keep it simpler. There are other projects for testing KMP targets. The main point of this test is to verify DGP can extract info (especially `android.jar`) from the Android KMP library plugin.

There's a workaround for an AGP8 bug that will be fixed in AGP9.

Fix #4211

Author: adam-enko

build.gradle.kts

@@ -126,6 +126,7 @@ idea {
                 "dokka-integration-tests/gradle/projects/it-multiplatform-android-jvm/expectedData",
                 "dokka-integration-tests/gradle/projects/it-android-compose/expectedData",
                 "dokka-integration-tests/gradle/projects/it-kotlin-multiplatform/expectedData",
+                "dokka-integration-tests/gradle/projects/it-android-kotlin-mp-builtin/expectedData",
 
                 "examples/gradle/dokka-versioning-multimodule-example/previousDocVersions/",
                 "examples/gradle-v2/versioning-multimodule-example/docs/previousDocVersions/",

dokka-integration-tests/gradle/projects/it-android-kotlin-mp-builtin/build.gradle.kts

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2014-2025 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+plugins {
+    id("com.android.kotlin.multiplatform.library") version "/* %{AGP_VERSION} */"
+    id("org.jetbrains.dokka") version "/* %{DGP_VERSION} */"
+    kotlin("multiplatform") version "/* %{KGP_VERSION} */"
+}
+
+kotlin {
+    androidLibrary {
+        namespace = "com.example.kmpfirstlib"
+        compileSdk = 33
+        minSdk = 24
+
+        withDeviceTestBuilder {
+            sourceSetTreeName = "test"
+        }
+    }
+
+    sourceSets {
+        androidMain {
+            dependencies {
+                implementation("androidx.appcompat:appcompat:1.1.0")
+            }
+        }
+    }
+}
+
+val agpMajorVersion: Int = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.split('.').first().toInt()
+if (agpMajorVersion < 9) {
+    // AGP 8 uses KotlinTarget JVM instead of AndroidJVM.
+    // This is an AGP 8 bug - it's fixed in AGP 9.
+    // For AGP <9, workaround the bug by manually enabling the Android documentation link.
+    dokka.dokkaSourceSets.configureEach {
+        enableAndroidDocumentationLink.set(true)
+    }
+}