Prevent panic on layout send in finish-load
<!-- Please describe your changes on the following line: -->
Do not run the finish load steps if the pipeline has been discarded by the time the parser finishes.
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [ ] `./mach build -d` does not report any errors
- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix#22955 (GitHub issue number if applicable)
<!-- Either: -->
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because ___
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Fix unloading, active BC, and clearing js runtime
<!-- Please describe your changes on the following line: -->
Do not set the window to be the currently active one for the windowproxy as part of `load`, as it will be done later when the document activity is set. And doing it later means that when unload runs, it is with the unloaded pipeline as the active window.
Only nullify the window proxy if it's not used by another (currently-active) window.
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [ ] `./mach build -d` does not report any errors
- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix#24591 (GitHub issue number if applicable)
<!-- Either: -->
- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because ___
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Require PromiseRejectionEventInit dictionary
<!-- Please describe your changes on the following line: -->
---
<!-- 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 fix#22670
<!-- Either: -->
- [x] There are tests for these changes
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
Update jemalloc-sys to 0.3.2
Update jemalloc-sys to 0.3.2 to avoid issue where jemalloc occasionally keeps
spinning in `je_spin_adaptive`.
- [X] `./mach build --release` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix#24791
Enable webxr by default
This changes two things:
* enable WebXR by default, since it's not exactly an experimental technology in Servo anymore
* enable the glwindow webxr backend by default so it's easier to test WebXR on desktop nightlies
Since the glwindow pref is only checked in the glutin desktop port, enabling it for other ports does not hurt us at all and it removes a papercut for testing WebXR content on desktop.
<!-- 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/24777)
<!-- Reviewable:end -->
Async wasm compilation event loop integration
The PR contains changes related to binding the runnable dispatching in script_runtime and is part of the Asynchronous WebAssembly Compilation fix. This is the first step in the subsequent steps mentioned in the [wiki](https://github.com/servo/servo/wiki/Asynchronous-WebAssembly-compilation-project).
---
<!-- 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 are part of #21476 fix
Media Session API
- [X] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#24172
- [x] There are tests for these changes
This PR introduces all the pieces required to prove an end to end media session flow with Android as a test platform.
