Xamarin Forms Android fails due to AppDomain.CurrentDomain.BaseDirectory

[jmichas]

Describe the bug

When using Microsoft.ApplicationInsights 2.12.0 on Xamarin Forms Android with Serilog.Sinks.ApplicationInsights configuring a Sink fails because on line 58 in file https://github.com/microsoft/ApplicationInsights-dotnet/blob/develop/BASE/src/Microsoft.ApplicationInsights/Extensibility/Implementation/Platform/PlatformImplementation.cs there is this: configFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "ApplicationInsights.config"); AppDomain.CurrentDomain.BaseDirectory is null on Android. I guess the Android project does not get caught in the #if NETSTANDARD on line 40 so when the read xml code runs it fails.

Probably could either add a catch for the exception thrown if path1 on Path.Combine is null or change the #if to include Android projects.

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[lafritay]

Making things worse, this continues to fire every 10 seconds or so which makes debugging Android projects nearly impossible.

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