Fix domain lookup toggles for Yat and Zcash.me providers (#3439)

Both providers checked the wrong SettingsStore flag in isEnabled(), so
their toggles in Settings > Connection and sync > Domain lookups had no
effect:

- YatAddressProvider read lookupsWellKnown instead of lookupsYatService,
  so the 'Yat' toggle did nothing and '.wellknown' unexpectedly gated it.
- ZcashMeAddressProvider read lookupsZcashNames instead of
  lookupsZcashAddress, so the 'Zcash.me' toggle did nothing and it was
  gated by the 'Zcash Names' toggle.

Each provider now reads the flag its own toggle writes, matching the
mapping in ConnectionSyncViewModel.lookupValue/setLookupValue.

lib/core/address_resolver/yat/yat_address_provider.dart

@@ -20,7 +20,7 @@ class YatAddressProvider extends AddressLookupProvider {
   bool canHandle(String q) => q.hasOnlyEmojis; // Yat handle example: 🐶🐾
 
   @override
-  bool isEnabled(SettingsStore settingsStore) => settingsStore.lookupsWellKnown;
+  bool isEnabled(SettingsStore settingsStore) => settingsStore.lookupsYatService;
 
   @override
   Future<List<ParsedAddress>> resolve({

lib/core/address_resolver/zcash/zcash_me_address_provider.dart

@@ -15,7 +15,7 @@ class ZcashMeAddressProvider extends AddressLookupProvider {
   List<CryptoCurrency> get supportedCurrencies => [CryptoCurrency.zec];
 
   @override
-  bool isEnabled(SettingsStore settingsStore) => settingsStore.lookupsZcashNames;
+  bool isEnabled(SettingsStore settingsStore) => settingsStore.lookupsZcashAddress;
 
   @override
   bool canHandle(String query) {