[DAS] Fixes import prefix occurrences on constructor invocation

Fixes: https://github.com/dart-lang/sdk/issues/61803
Change-Id: I313064a26e48f05c6c1408c24911dc77f8b9fad8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/457220
Auto-Submit: Felipe Morschel <git@fmorschel.dev>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>

pkg/analysis_server/lib/src/domains/analysis/occurrences_dart.dart

@@ -132,6 +132,8 @@ class DartUnitOccurrencesComputerVisitor extends GeneralizingAstVisitor<void> {
       if (element != null) {
         _addOccurrence(element, node.type.name);
       }
+      // Still visit the import prefix if there is one.
+      node.type.importPrefix?.accept(this);
       return; // skip visitNamedType.
     }
 

pkg/analysis_server/test/analysis/notification_occurrences_test.dart

@@ -637,12 +637,13 @@ class A {
   void m() {
     /*[1*/p/*1]*/.foo();
     print(/*[2*/p/*2]*/.a);
+    /*[3*/p/*3]*/.A();
   }
 }
 
 void foo() {}
 
-/*[3*/p/*3]*/.A? a;
+/*[4*/p/*4]*/.A? a;
 ''');
   }
 

pkg/analysis_server/test/lsp/document_highlights_test.dart

@@ -370,12 +370,13 @@ class A {
   void m() {
     /*[1*/p/*1]*/.foo();
     print(/*[2*/p/*2]*/.a);
+    /*[3*/p/*3]*/.A();
   }
 }
 
 void foo() {}
 
-/*[3*/p/*3]*/.A? a;
+/*[4*/p/*4]*/.A? a;
 ''');
 
   Future<void> test_prefixed() => _testMarkedContent('''