Utils: Use an enum indication the possible abort of an dir iteration

The bool is not really clear.

Change-Id: I4ce6412736aec6b1853fd53d4e535ad045748350
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/android/androidconfigurations.cpp

@@ -350,7 +350,7 @@ static QList<int> availableNdkPlatformsLegacy(const FilePath &ndkLocation)
                     filePath.toString()
                         .mid(filePath.path().lastIndexOf('-') + 1)
                         .toInt());
-                return true;
+                return IterationPolicy::Continue;
             },
             {{"android-*"}, QDir::Dirs});