FIR: Add java.io.Serializable as supertypes to built-in classes

compiler/fir/analysis-tests/testData/resolveWithStdlib/j+k/serializableString.kt

@@ -0,0 +1,6 @@
+// FULL_JDK
+fun foo(x: java.io.Serializable) {}
+
+fun main() {
+    foo("")
+}

compiler/fir/analysis-tests/testData/resolveWithStdlib/j+k/serializableString.txt

@@ -0,0 +1,6 @@
+FILE: serializableString.kt
+    public final fun foo(x: R|java/io/Serializable|): R|kotlin/Unit| {
+    }
+    public final fun main(): R|kotlin/Unit| {
+        R|/foo|(String())
+    }