Setup overridability rules for properties built on Java fields

- They overrides each other
- They do not overrides Kotlin propeties and vice versa

compiler/testData/diagnostics/tests/j+k/privateFieldOverridesNothing.kt

@@ -0,0 +1,19 @@
+// FILE: B.java
+
+abstract class B implements A {
+    private int size = 1;
+}
+
+// FILE: main.kt
+
+interface A {
+    val size: Int
+}
+
+class C : B() {
+    override val size: Int get() = 1
+}
+
+fun foo() {
+    C().size 
+}