libobs: Also determine WinUI 3 Window

[qhy040404]

Description

Besides UWP applications, which means WinUI 2 applications that cannot be captured by BitBlt, WinUI 3 applications also cannot be captured by BitBlt. This commit adds a check for WinUI 3 applications.

Motivation and Context

Just as we cannot use Bitblt to capture the screen of UWP (WinUI 2) applications, WinUI 3 applications also have this problem. However, we have not made any special judgment on WinUI 3 at present.

How Has This Been Tested?

• Install WinUI 3 Gallery and WinUI 2 Gallery, which is, WinUI 3 applications and UWP (WinUI 2) applications.
• Use Window Capture to capture these two windows using Automatic.
• Specify the capture method to BitBlt and check the hint.

Both windows are captured by WGC correctly, and the hints are displayed correctly when selecting BitBlt.

Testing environment:

• i9-11900H
• RTX 3060 Laptop
• Windows 11 26120.961 (Insider Dev)

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• [x] My code has been run through clang-format.
• [x] I have read the contributing document.
• [x] My code is not on the master branch.
• [x] The code has been tested.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] I have included updates to all appropriate documentation.