The screencasting code does not properly support all XDG Desktop Portal implementations that it should

[Siri-chan]

Describe the bug
The screencasting code does not support screencasting on some XDG Desktop Portal implementations that should support it (ie. xdg-desktop-portal-hyprland)

To Reproduce
Steps to reproduce the behavior:

1. Run the program on the command line with `--trace-warnings``
2. Select to Host a Session
3. Start a new session

Expected behavior
The program requests a screencast through the Hyprland XDG Desktop Portal / Pipewire.

Error Message:

[433058:1219/162502.787509:ERROR:base_capturer_pipewire.cc(81)] ScreenCastPortal failed: 3
(node:433058) UnhandledPromiseRejectionWarning: Failed to get sources.
    at emitUnhandledRejectionWarning (node:internal/process/promises:300:15)
    at warnWithErrorCodeUnhandledRejectionsMode (node:internal/process/promises:406:5)
    at processPromiseRejections (node:internal/process/promises:470:17)
    at process.processTicksAndRejections (node:internal/process/task_queues:96:32)
(node:433058) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)

Desktop (please complete the following information):

• OS: Arch Linux
• Version: Kernel 6.12
• Pipewire 1.2.7
• Hyprland XDG Desktop Portal on latest git.

[gorillamoe]

Seems like an issue with hyprland?!

hyprwm/xdg-desktop-portal-hyprland#251