Contacts plugin should gracefully handle error when permission is not declared

[evshi]

Reproduction:

1. Clone ensemble starter
2. Enable contacts
3. Make sure NSContactsUsageDescription is not info.plist
4. Create a widget that uses contacts

Error:

2023-08-10 12:17:42.747718-0700 Runner[31111:29586773] [access] This app has crashed because it attempted to access privacy-sensitive data without a usage description.  The app's Info.plist must contain an NSContactsUsageDescription key with a string value explaining to the user how the app uses this data.
Message from debugger: Terminated due to signal 6

App crashes

Resolution:

We should handle this error gracefully or prevent it so the app doesn't crash silently

Related PR:
https://github.com/EnsembleUI/tin_ensemble_app/pull/5

[evshi]

cc: @amin-nas @vinothvino42 @vusters