Surface exception for not supported phone number on iOS PhoneDialer

[jfversluis]

Description of Change

Doesn't swallow the exception because of the async void that was going on

Bugs Fixed

• Fixes [Bug] App crashes on ios simulator when using PhoneDialer.Open() even though exception handling is present #1652
• Fixes [Bug] PhoneDialer not working with ios 15.4 if phone number has special characters  #1984

API Changes

N/A

Behavioral Changes

Doesn't swallow the exception because of the async void that was going on

PR Checklist

• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Updated documentation (see walkthrough)

[jfversluis]

@jamesmontemagno this seems like a small one we can also pull into 1.7.2?

[jfversluis]

Reviewed through .NET MAUI change. If it's good enough for .NET MAUI, it's good enough for Xamarin!