Bump WinAppSDK to 1.6

[Foda]

Description of Change

Bump WinAppSDK to 1.6

Fixes

Fixes #24875
Fixes #22697
Fixes #11472
Fixes #22894

[MartyIX]

This PR should fix #11472 (#11472 (comment)).

[Foda]

@mattleibow Currently blocked on this by: microsoft/WindowsAppSDK#4646

[MartyIX]

@Foda Regarding this

maui/src/Core/src/Platform/Windows/MauiWinUIWindow.cs

Lines 65 to 69 in 642a352

	// We have to track isActivated calls because WinUI will call OnActivated Twice
	// when maximizing a window
	// https://github.com/microsoft/microsoft-ui-xaml/issues/7343
	if (_isActivated)
	return;

, the corresponding issue was fixed in microsoft/microsoft-ui-xaml#7343 for WinAppSDK 1.6.

It's probably better to have that if statement (just in case?) but perhaps one should log an error there because the issue should be fixed.

[manodasanW]

Looks like this and above got uncommented during merge. This is already set to 44 in the props.

[Foda]

Oops -- lemme remove this

[Foda]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[PureWeen]

• Failing tests are unrelated

[PureWeen]

/backport to release/9.0.1xx

[github-actions]

Started backporting to release/9.0.1xx: https://github.com/dotnet/maui/actions/runs/11352164269

[github-actions]

@PureWeen backporting to release/9.0.1xx failed, the patch most likely resulted in conflicts:

$ git am --3way --empty=keep --ignore-whitespace --keep-non-patch changes.patch

Applying: Bump WinAppSDK version + WebView2 version
Using index info to reconstruct a base tree...
M	Directory.Build.props
M	Directory.Build.targets
M	NuGet.config
M	eng/NuGetVersions.targets
M	eng/Versions.props
M	src/Core/src/Core.csproj
M	src/Essentials/src/Essentials.csproj
M	src/Graphics/samples/GraphicsTester.WinUI.Desktop/GraphicsTester.WinUI.Desktop.csproj
M	src/Graphics/src/Graphics.Win2D/Graphics.Win2D.csproj
M	src/Graphics/src/Graphics/Graphics.csproj
Falling back to patching base and 3-way merge...
Auto-merging src/Graphics/src/Graphics/Graphics.csproj
CONFLICT (content): Merge conflict in src/Graphics/src/Graphics/Graphics.csproj
Auto-merging src/Graphics/src/Graphics.Win2D/Graphics.Win2D.csproj
Auto-merging src/Graphics/samples/GraphicsTester.WinUI.Desktop/GraphicsTester.WinUI.Desktop.csproj
Auto-merging src/Essentials/src/Essentials.csproj
Auto-merging src/Core/src/Core.csproj
Auto-merging eng/Versions.props
CONFLICT (content): Merge conflict in eng/Versions.props
Auto-merging eng/NuGetVersions.targets
Auto-merging NuGet.config
Auto-merging Directory.Build.targets
CONFLICT (content): Merge conflict in Directory.Build.targets
Auto-merging Directory.Build.props
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0001 Bump WinAppSDK version + WebView2 version
Error: The process '/usr/bin/git' failed with exit code 128

Please backport manually!

[github-actions]

@PureWeen an error occurred while backporting to release/9.0.1xx, please check the run log for details!

Error: git am failed, most likely due to a merge conflict.