[Bug] Mobile code uses deprecated APIs

[bgavrilMS]

Library version used

4.64.0

.NET version

net6-android, net6-ios

Scenario

PublicClient - mobile app

Is this a new or an existing app?

None

Issue description and reproduction steps

Build MSAL as a developer, with mobile targets enabled. The compiler will issue several warnings for example on:

This call site is reachable on: 'iOS' 14.2 and later, 'maccatalyst' 14.2 and later. 'UIApplication.OpenUrl(NSUrl)' is obsoleted on: 'ios' 10.0 and later (Please use the overload instead.), 'maccatalyst' 10.0 and later (Please use the overload instead.).

https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/main//src/client/Microsoft.Identity.Client/Platforms/iOS/Broker/iOSBroker.cs#L183

Impact

When Google / Apple actually obsolete these APIs, apps will start crashing.