Add caution commit for one of the constructors in AppListRepository

Test: n/a

Bug: 304255511
Change-Id: I69a5c4e72c28b006ddd9a4309e87ac84d708ace3

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/model/app/AppListRepository.kt

@@ -67,6 +67,9 @@ object AppListRepositoryUtil {
         AppListRepositoryImpl(context).getSystemPackageNamesBlocking(userId)
 }
 
+/**
+ * This constructor is visible for tests only in order to override `featureFlags`.
+ */
 class AppListRepositoryImpl(
     private val context: Context,
     private val featureFlags: FeatureFlags