New Keyboard solution questions

So I tried the solution for the keyboard in chat screens offered by the ionic team in the link below:

I tried the latest release of this plugin - as of today 1.1.3 - with Ionic 2.2.1, followed instructions in the github repo, added the code below and removed ionic-plugin-keyboard (I assumed this is what @manucorporat meant in his comment) in the thread in the link - did the npm install for the plugin, built the App and tried it.

On iOS simulator with iOS version 10+ and it worked well as expected with no problems and no crashing. I still have to try it on a real phone (previously my app crashed when using the solution here )
A tip for the keyboard disappearing, add this to the button

The config.xml included

<feature name="CDVWKWebViewEngine">
  <param name="ios-package" value="CDVWKWebViewEngine"/>
<plugin name="cordova-plugin-wkwebview-engine" spec="~1.1.3"/>
<plugin name="cordova-plugin-keyboard" spec=""/>
<allow-navigation href="http://localhost:8080/*"/>

I have three questions, if anyone can help:
1- Will things continue to work normally on Android after removing the ionic-plugin-keyboard?
2- Is this <allow-navigation href="http://localhost:8080/*"/> correct? with localhost:8080 ?
3- Should I remove this code below from the config.xml

<feature name="Keyboard">
  <param name="ios-package" onload="true" value="IonicKeyboard"/>