Auto merge of #27232 - asajeffrey:webxr-depth-stencil, r=Manishearth

Support depth and stencil in webxr

<!-- Please describe your changes on the following line: -->

Creates a `DEPTH_STENCIL` attachment if one is provided by the webxr device.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because we don't reftest webxr

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Cargo.lock

@@ -6778,7 +6778,7 @@ dependencies = [
 [[package]]
 name = "webxr"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#de60f3ebe01b1e829393c980a6126924b5f60075"
+source = "git+https://github.com/servo/webxr#d9ec2263b017d9c415ce35e0f4417a454564bcf2"
 dependencies = [
  "android_injected_glue",
  "bindgen",
@@ -6801,7 +6801,7 @@ dependencies = [
 [[package]]
 name = "webxr-api"
 version = "0.0.1"
-source = "git+https://github.com/servo/webxr#de60f3ebe01b1e829393c980a6126924b5f60075"
+source = "git+https://github.com/servo/webxr#d9ec2263b017d9c415ce35e0f4417a454564bcf2"
 dependencies = [
  "euclid",
  "ipc-channel",