Auto merge of #22871 - jdm:simpleml, r=ajeffrey,paul

Use simpleservo embedding API for Magic Leap

This removes the duplication between the two ports and makes it easier to improve all of our embeddings simultaneously.

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #22065
- [x] These changes do not require tests because no automated tests for embedded devices.

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/22871)
<!-- Reviewable:end -->

components/servo/lib.rs

@@ -112,6 +112,7 @@ use webrender::{RendererKind, ShaderPrecacheFlags};
 use webvr::{VRServiceManager, WebVRCompositorHandler, WebVRThread};
 
 pub use gleam::gl;
+pub use keyboard_types;
 pub use msg::constellation_msg::TopLevelBrowsingContextId as BrowserId;
 pub use servo_config as config;
 pub use servo_url as url;