convert to diamonds: take care of java 8 inference, check on non-physical elements (IDEA-151559)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/explicit2diamond/after4.java

@@ -0,0 +1,16 @@
+// "Replace with <>" "true"
+class Test {
+
+    void test() {
+        class Foo<X extends Number> {
+            Foo() {}
+            Foo(X x) {}
+        }
+        Foo<Number> f1 = new Foo<>(1);
+        Foo<?> f2 = new Foo<Number>();
+        Foo<?> f3 = new Foo<Integer>();
+        Foo<Number> f4 = new Foo<Number>(1) {};
+        Foo<?> f5 = new Foo<Number>() {};
+        Foo<?> f6 = new Foo<Integer>() {};
+    }
+}