Add MockCreateSolidColorBrush to MockCanvasDevice.
Add MockCreateSolidColorBrush to MockCanvasDevice.

LanceMcCarthy/Win2D,LanceMcCarthy/Win2D,ChrisBriggsy/Win2D,ChrisBriggsy/Win2D,zjsxwc/Win2D,ChrisBriggsy/Win2D,zjsxwc/Win2D,LanceMcCarthy/Win2D,zjsxwc/Win2D