message: Set scroll flags of toolbar
  Also, removed CollapsingToolbarLayout for now. Shouldn't need it for basic example
diff: @@ -56,10 +56,10 @@ public class NavigationBarView extends AppBarLayout {
  public NavigationBarView(Context context) {
  super(context);
  - toolbarLayout = new CollapsingToolbarLayout(context);
  - addView(toolbarLayout, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
  + //toolbarLayout = new CollapsingToolbarLayout(context);
  + //addView(toolbarLayout, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
  toolbar = new Toolbar(context);
  - toolbarLayout.addView(toolbar, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
  + addView(toolbar, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
  defaultTitleTextColor = getDefaultTitleTextColor();
  defaultOverflowIcon = toolbar.getOverflowIcon();
  @@ -127,6 +127,9 @@ public class NavigationBarView extends AppBarLayout {
  protected void onAttachedToWindow() {
  super.onAttachedToWindow();
  attachDraweeHolders();
  + AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
  + params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS);
  + toolbar.requestLayout();
  }
  @Override
  