13 files declare their use of ContextAwarePluginInterface in Drupal 8

BlockAccessControlHandler.php in core/modules/block/src/BlockAccessControlHandler.php

BlockForm.php in core/modules/block/src/BlockForm.php

BlockRepositoryTest.php in core/modules/block/tests/src/Unit/BlockRepositoryTest.php

Contains \Drupal\Tests\block\Unit\BlockRepositoryTest.

BlockViewBuilder.php in core/modules/block/src/BlockViewBuilder.php

ConfigureBlockFormBase.php in core/modules/layout_builder/src/Form/ConfigureBlockFormBase.php

ContextHandler.php in core/lib/Drupal/Core/Plugin/Context/ContextHandler.php

ContextHandlerInterface.php in core/lib/Drupal/Core/Plugin/Context/ContextHandlerInterface.php

ContextHandlerTest.php in core/tests/Drupal/Tests/Core/Plugin/ContextHandlerTest.php

Contains \Drupal\Tests\Core\Plugin\ContextHandlerTest.

ExtraFieldBlock.php in core/modules/layout_builder/src/Plugin/Block/ExtraFieldBlock.php

FieldBlock.php in core/modules/layout_builder/src/Plugin/Block/FieldBlock.php

SectionComponent.php in core/modules/layout_builder/src/SectionComponent.php

SectionRenderTest.php in core/modules/layout_builder/tests/src/Unit/SectionRenderTest.php

SectionStorageInterface.php in core/modules/layout_builder/src/SectionStorageInterface.php