Missing schema for OEmbed formatter

Problem/Motivation

In issue #3541992, I hadn’t noticed that the schema for the OEmbed formatter was also missing.

[warning] Schema errors for core.entity_view_display.media.remote_video.default with the following errors: core.entity_view_display.media.remote_video.default:content.field_media_oembed_video.settings.image missing schema, core.entity_view_display.media.remote_video.default:content.field_media_oembed_video.settings.image_style missing schema, core.entity_view_display.media.remote_video.default:content.field_media_oembed_video.settings.aria_label missing schema. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.

Steps to reproduce

1. Enable the module.
2. Choose a field that can be embedded (for example, the field_media_oembed_video field of the native Remote Video media type).
3. In the display settings, set its format to “OEmbed Orejime: Iframe Consent”.
4. Save.

The warning may also appear in the Configuration Inspector.

Proposed resolution

• Add the formatter mapping to the configuration schema.

Remaining tasks

User interface changes

API changes

Data model changes