Declare GuestTelephonyPreferenceController xml exempt

The GuestTelephonyPreferenceController is related to conditional toggle appearance. Depends if Telephony is supprted by the device, therefore it is not statically defined in xml.

Also order list alphabetically.

Bug: b/289967472
Test:
1. Remove @Ignore tag from `CodeInspectionTest#runSliceControllerInXmlInspection`
2. atest CodeInspectionTest

Change-Id: I5fb95bdd5ca8cb2a5aa1096f57a425a2efa74cf9