Updates

• allow the MaterialDrawerSliderView.kt to be embedded in other layouts (2 levels max for now)
    - properly find DrawerLayout
• allow global adjustment of selected state animation
• further enforcing of the proper drawable state to get applied if we have animation enabled
• constraintLayout 2.0.0-beta7

Sample

• add swipeRefreshLayout to CollapsingToolbarActivity.kt sample app
• use lighter colors as they work better with dark and light theme
• hookup ActionBarDrawerToggle with drawer