title: TabbedPage Toolbar only shows the active ToolbarItem when ToolbarPlacement is bottom and ContentPage count bigger than 4
body: <p>There is a feature in Xamarin.Forms 3.1 version which we already support for Android toolbar to be placed in the bottom. But when the content page within the Tabbed Page is bigger than 4, then the Toolbar will no show all the tabs there, only the current active tab will be showed.
   the other ones can be only switched and then the tab will be selected accordingly.
  this is my code, There should be four tabs in the toolbar :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;TabbedPage
  x:Class="MelkRadar.App.MobileApp.Views.TabbedView"
  xmlns="http://xamarin.com/schemas/2014/forms"
  xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
  xmlns:android="clr-namespace:Xamarin.Forms.PlatformConfiguration.AndroidSpecific;assembly=Xamarin.Forms.Core"
  xmlns:view="clr-namespace:MelkRadar.App.MobileApp.Views"
  android:TabbedPage.ToolbarPlacement="Bottom"
  BarTextColor="Red"&gt;
  
  &lt;view:CustomerExplorerView Title="مشتریان" /&gt;
  &lt;view:RealtorSettingView Title="تنظیمات" /&gt;
  &lt;view:FavoriteAdvertsExplorerView Title="زونکن" /&gt;
  &lt;view:AdvertsExplorerView Title="اگهی ها" /&gt;
  
  &lt;/TabbedPage&gt;
  </code></pre>
  
  <p>see this pictures please:</p>
  
  <p><a href="https://cdn1.imggmi.com/uploads/2019/6/11/6659fa76fc68ae58deb17d6dfd74f089-full.jpg" rel="nofollow noreferrer">https://cdn1.imggmi.com/uploads/2019/6/11/6659fa76fc68ae58deb17d6dfd74f089-full.jpg</a>
  <a href="https://cdn1.imggmi.com/uploads/2019/6/11/150fe2463357f9008da3bed6d976d1bd-full.jpg" rel="nofollow noreferrer">https://cdn1.imggmi.com/uploads/2019/6/11/150fe2463357f9008da3bed6d976d1bd-full.jpg</a></p>
  
  <p>I need to show all page titles. what should I do for this problem?</p>