InkToolbar Style updates (#4507)

* Style updates

* Style updates

* Updated Buttons Width and Height

* Style updates: Added Margin to buttons, removed pill, added chevron back

* Flyout style updates

* Remove unused InkToolbarFlyoutL3PreviewPen Color

* Fixed Color and Size of chevron

* Improved margin, changed the chevron color

* Added flyout item pill hover color

* Margin changes

* Margin changes

* Changed the size from 40 px to 36 px

* Added Contract7Present for CornerRadius

* Removed stray spaces

* Added word Foreground to Accent colors

* Removed commented margin

* Removed InkToolbarSelectionAccentStyle and it's references

* Merged two visual state groups to one

* Changed RadiusX from 8 to 1.5

* Added vertical inkToolbar test

* Added vertical support and opening flyout tests

* Removed unused code

* Changed CurrentSelectionIcon.Opacity to 0 from 1 in disabled state

* Removed unused code

* Removed ambiguous test

* Updated InkToolbarButtonContentSize to InkToolbarButtonFontSize

* Using StaticResource instead of ThemeResource

* Added open flyout test and vertical inktoolbar test

* Added contract7Present API before CornerRadius

* Removed ShowExtensionGlyph visualStateGroups

* Margin updates

* Corrected Typos in InkToolbarButtonSelectedBackgroundPointerOver Resource key

Co-authored-by: Vivek Sharma <[email protected]>