Issue #2095125 by Xano: Use access constants in every access control context.

core/lib/Drupal/Core/Access/AccessInterface.php

core/lib/Drupal/Core/Access/AccessibleInterface.php

core/lib/Drupal/Core/Entity/EntityInterface.php

core/lib/Drupal/Core/Entity/Field/FieldItemListInterface.php

core/lib/Drupal/Core/Routing/Access/AccessInterface.php

core/lib/Drupal/Core/TypedData/Annotation/DataType.php

...modules/node/lib/Drupal/node/Plugin/Search/NodeSearch.php

.../modules/search/lib/Drupal/search/SearchPluginManager.php

core/modules/system/entity.api.php

...ystem/lib/Drupal/system/Tests/Entity/EntityAccessTest.php

...modules/user/lib/Drupal/user/Plugin/Search/UserSearch.php

core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php

core/tests/Drupal/Tests/Core/Access/AccessManagerTest.php