Fix email-link with custom layouts (#1955)

Author: samtstern

auth/src/main/java/com/firebase/ui/auth/ui/idp/AuthMethodPickerActivity.java

@@ -242,7 +242,8 @@ private void populateIdpListCustomLayout(List<IdpConfig> providerConfigs) {
             }
             boolean hasProvider = false;
             for (IdpConfig idpConfig : providerConfigs) {
-                if (providerBtnId.equals(idpConfig.getProviderId())) {
+                String providerId = providerOrEmailLinkProvider(idpConfig.getProviderId());
+                if (providerBtnId.equals(providerId)) {
                     hasProvider = true;
                     break;
                 }