Add KotlinCompile.androidLayoutResources input

This input is used by 'android-extensions' subplugin to track changed
Android layout resource files.

^KT-32805 In Progress

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/KaptGenerateStubsTask.kt

@@ -125,6 +125,9 @@ abstract class KaptGenerateStubsTask @Inject constructor(
     @get:Internal
     override val scriptSources: FileCollection = objectFactory.fileCollection()
 
+    @get:Internal
+    override val androidLayoutResources: FileCollection = objectFactory.fileCollection()
+
     override val incrementalProps: List<FileCollection>
         get() = listOf(
             sources,

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/android/internal/AndroidSubplugin.kt

@@ -130,7 +130,7 @@ class AndroidSubplugin : KotlinCompilerPluginSupportPlugin {
                 )
             )
             kotlinCompilation.compileKotlinTaskProvider.configure {
-                it.setSource(getLayoutDirectories(project, sourceSet.res.srcDirs))
+                it.androidLayoutResourceFiles.from(getLayoutDirectories(project, sourceSet.res.srcDirs))
             }
         }
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -743,6 +743,7 @@ abstract class KotlinCompile @Inject constructor(
             sources,
             javaSources,
             scriptSources,
+            androidLayoutResources,
             commonSourceSet,
             classpathSnapshotProperties.classpath,
             classpathSnapshotProperties.classpathSnapshot
@@ -987,6 +988,22 @@ abstract class KotlinCompile @Inject constructor(
                 .matching(::javaFilesPatternFilter)
         )
 
+    @get:Internal
+    internal val androidLayoutResourceFiles = objectFactory.fileCollection()
+
+    /**
+     * This input is used by android-extensions plugin
+     */
+    @get:Incremental
+    @get:InputFiles
+    @get:IgnoreEmptyDirectories
+    @get:PathSensitive(PathSensitivity.RELATIVE)
+    internal open val androidLayoutResources: FileCollection = androidLayoutResourceFiles
+        .asFileTree
+        .matching { patternFilterable ->
+            patternFilterable.include("xml".fileExtensionCasePermutations().map { "**/*.$it" })
+        }
+
     // override setSource to track Java and script sources as well
     override fun setSource(source: Any) {
         javaSourceFiles.from(source)