Render flexible types with enhancement as enhanced in IDE (KT-25622)

Main targets for the fix is completion, parameters info, inlay hints and
override/implement.

Other IDE functions might be affected.

 #KT-24911 Fixed
 #KT-25616 Fixed
 #KT-25622 Fixed

idea/testData/codeInsight/overrideImplement/androidxNotNull/androidx/annotation/RecentlyNonNull.java

@@ -0,0 +1,8 @@
+package androidx.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+
+@Target({ElementType.PARAMETER, ElementType.TYPE})
+public @interface RecentlyNonNull {
+}

idea/testData/codeInsight/overrideImplement/androidxNotNull/androidx/annotation/RecentlyNullable.java

@@ -0,0 +1,9 @@
+package androidx.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+import java.lang.reflect.Parameter;
+
+@Target({ElementType.PARAMETER, ElementType.TYPE})
+public @interface RecentlyNullable {
+}

idea/testData/codeInsight/overrideImplement/androidxNotNull/foo/A.java

@@ -0,0 +1,10 @@
+package foo;
+
+import androidx.annotation.RecentlyNonNull;
+import androidx.annotation.RecentlyNullable;
+
+public class A {
+    public @RecentlyNonNull String foo(@RecentlyNonNull String s1, @RecentlyNullable String s2) {
+        return null;
+    }
+}

idea/testData/codeInsight/overrideImplement/androidxNotNull/foo/Impl.kt

@@ -0,0 +1,5 @@
+import foo.A
+
+class B : A() {
+    <caret>
+}

idea/testData/codeInsight/overrideImplement/androidxNotNull/foo/Impl.kt.after

@@ -0,0 +1,7 @@
+import foo.A
+
+class B : A() {
+    override fun foo(s1: String, s2: String?): String {
+        return super.foo(s1, s2)
+    }
+}