[Testing] Implement ScrollDownTo and ScrollUpTo methods in Appium

[jsuarezruiz]

Description of Change

Implement ScrollDownTo and ScrollUpTo methods in Appium.

Added:

• ScrollDownTo: Scroll down until an element that matches the marked is shown on the screen. It is equivalent to https://learn.microsoft.com/en-us/dotnet/api/xamarin.uitest.iapp.scrolldownto?view=xamarin-uitest-sdk
• ScrollUpTo: Scroll up until an element that matches the marked is shown on the screen. It is equivalent to https://learn.microsoft.com/en-us/dotnet/api/xamarin.uitest.iapp.scrollupto?view=xamarin-uitest-sdk
• PrintTree: Print in the Output the current application hierarchy XML (app).

Example:

App.ScrollDownTo("25", ListViewId, ScrollStrategy.Auto); Scroll the element identify by the AutomationId ListViewId until an element with the id or text "25" is shown on the screen.

[jfversluis]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[jsuarezruiz]

/rebase