J2K: Get nullability from variable initializer when converting call

#KT-11534 In Progress

j2k/testData/fileOrElement/nullability/nullableInitializer2.kt

@@ -0,0 +1,20 @@
+// ERROR: Type mismatch: inferred type is String? but String was expected
+class TestJava {
+    fun nullableObj(p: Int): Any? {
+        return if (p > 0) "response" else null
+    }
+
+    var nullableInitializerFieldCast: String = nullableObj(3) as String?
+    private val nullableInitializerPrivateFieldCast = nullableObj(3) as String?
+
+    fun testProperty() {
+        nullableInitializerFieldCast[0]
+        nullableInitializerPrivateFieldCast!![0]
+    }
+
+    fun testLocalVariable() {
+        val nullableInitializerValCast = nullableObj(3) as String?
+
+        nullableInitializerValCast!![0]
+    }
+}