[Java. Intention Actions] Do not add implicitly declared class to import list

^IDEA-370603 fixed

GitOrigin-RevId: 0cfcef57e1b1dbccea05ab68a57c8906df0e753c

java/java-impl/src/com/intellij/psi/impl/source/codeStyle/ImportHelper.java

@@ -1186,6 +1186,9 @@ public final class ImportHelper {
         }
 
         if (refElement instanceof PsiClass psiClass) {
+          // Implicitly declared classed are not accessible outside the file, so it is not possible to have import statement on them.
+          if (refElement.getParent() instanceof PsiImplicitClass) continue;
+
           String qName = psiClass.getQualifiedName();
           if (qName == null || hasPackage(qName, thisPackageName)) continue;
           imports.add(new Import(qName, false));

java/java-tests/testData/psi/optimizeImports/InvalidExtendsList.java

@@ -0,0 +1,7 @@
+package B;
+
+public class A extends <A> {
+	public A() {
+
+  }
+}

java/java-tests/testData/psi/optimizeImports/InvalidExtendsList_after.java

@@ -0,0 +1,7 @@
+package B;
+
+public class A extends <A> {
+	public A() {
+
+  }
+}

java/java-tests/testSrc/com/intellij/java/psi/OptimizeImportsTest.java

@@ -772,6 +772,8 @@ public class OptimizeImportsTest extends OptimizeImportsTestCase {
   public void testUnresolvedReferenceAfterParenthesis() {
     doTest();
   }
+
+  public void testInvalidExtendsList() { doTest(); }
   
   private void doTest() {
     doTest(".java");