Android Extensions: Support Dialog classes (KT-16957)

plugins/android-extensions/android-extensions-compiler/testData/codegen/bytecodeShape/dialog/dialog.kt

@@ -0,0 +1,13 @@
+package test
+
+import android.app.Dialog
+import kotlinx.android.synthetic.main.layout.*
+
+fun test(dialog: Dialog) {
+    dialog.login
+}
+
+// 1 GETSTATIC test/R\$id\.login
+// 1 INVOKEVIRTUAL android/app/Dialog\.findViewById
+// 1 CHECKCAST android/widget/Button
+// 0 _\$_findCachedViewById

plugins/android-extensions/android-extensions-compiler/testData/codegen/bytecodeShape/dialog/res/layout/layout.xml

@@ -0,0 +1,17 @@
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+             xmlns:tools="http://schemas.android.com/tools"
+             android:id="@+id/item_detail_container"
+             android:layout_width="match_parent"
+             android:layout_height="match_parent"
+             tools:context=".ItemDetailActivity"
+             tools:ignore="MergeRootFrame" >
+
+
+
+    <Button
+        android:id="@+id/login"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Sign in" />
+
+</FrameLayout>