ASWebAuthenticationSession is skipped due to AppCenter build flags

[jennyf19]

Which Version of MSAL are you using ?
2.2.7 and 3.x

Platform
Xamarin iOS

Repro
Use an iOS 12+ device.
Interactive login
SFAuthenticationSession is used

Expected behavior
ASWebAuthenticationSession should be used

Possible Solution
Put a breakpoint here and check that the device is 12+ and ASWebAuthSession is being used for authentication. Check w/iOS 11 device and 10< device as well to make sure everything is hit correctly.

The flags currently used: #if BUILDENV != APPCENTER are build flags and not set.

Fix needs to go into v2 and v3.