[Update] Namespace from Com.OneSignal to OneSignalSDK.Xamarin

[tanaynigam]

Description

One Line Summary

Update namespaces, files, and folder names from Com.OneSignal to OneSignalSDK.Xamarin

Details

Motivation

Updates all namespaces of the core library consisting of Xamarin Android, Xamarin iOS, Xamarin Core, Xamarin OneSignal Default, and Sample apps to incorporate OneSignalSDK.Xamarin instead of Com.OneSignal. These do not include Bindings Libraries which continue using Com.OneSignal as their namespace

Scope

• Update file, folder and namespace of Xamarin Android from Com.OneSignal.Android to OneSignalSDK.Xamarin.Android
• Update file, folder and namespace of Xamarin Android from Com.OneSignal.iOS to OneSignalSDK.Xamarin.iOS
• Update file, folder and namespace of Xamarin Android from Com.OneSignal.Core to OneSignalSDK.Xamarin.Core
• Update file, folder and namespace of OneSignal Default instance class from Com.OneSignal to OneSignalSDK.Xamarin
• Update OneSignalSDK.Xamarin.Core's OneSignalSDK abstract partial class to OneSignalSDKInternal
• Update project and configuration files to reflect namespace changes
• Update nuspec file to relfect namespace changes
• Update nuspec file to change nuget package name to OneSignal.Xamarin
• Update file, folder and namespace of Sample Apps from Com.OneSignal.Sample.Droid, Com.OneSignal.Sample.iOS and Com.OneSignal.Sample.Shared to OneSignalApp.Sample.Droid, OneSignalApp.Sample.iOS and OneSignalApp.Sample.Shared respectively
• Update import in Sample Apps from Com.OneSignal to OneSignalSDK.Xamarin

Testing

Manual Testing

• Created a local NuGet package and imported it to a fresh Xamarin App project. Tested OneSignalSDK.Xamarin and OneSignalSDK.Xamarin.Core import requirements.
• Build and run Xamarin app from a fresh Xamarin App project on Android and iOS devices
• Build and run Xamarin app from OneSignal Sample App project on Android and iOS devices

---

This change is