Migrate boxWithJava tests to multi-file framework

compiler/testData/codegen/java8/box/samOnInterfaceWithDefaultMethod.kt

@@ -0,0 +1,28 @@
+// FILE: JavaCall.java
+
+class JavaCall {
+    String call(Test test) {
+        return test.call();
+    }
+}
+
+// FILE: Test.java
+
+interface Test {
+
+    String call();
+
+    default String test() {
+        return "K";
+    }
+
+    static String testStatic() {
+        return "K";
+    }
+}
+
+// FILE: sam.kt
+
+fun box(): String {
+    return JavaCall().call {"OK"}
+}