[Gradle] Associate Android java sources with related Kotlin Source Set

Java sources can be produced by the task or can be configured with
task dependencies. Previously sources were included into task directly
now they are properly configured with Kotlin Android Source Set.

^KT-63753 Verification Pending
^KT-65426 Verification Pending

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

@@ -973,11 +973,6 @@ class KotlinAndroidMppIT : KGPBaseTest() {
             defaultBuildOptions.copy(androidVersion = agpVersion),
             buildJdk = jdkVersion.location
         ) {
-            // Hacks for TODO: KT-65426
-            val appPath = subProject("app").projectPath
-            appPath.resolve("src/main/java/app/example/com/app_sample").deleteRecursively()
-            appPath.resolve("src/commonMain/kotlin/A.kt").replaceText("expect fun f(): Unit", "")
-
             // Code copied from the reproducer from KT-63753
             subProject("app").buildGradleKts.appendText(
                 """