sip: fixed crashing when typing contact

Fixed an issue where a crash occurred when you try to type a contact name on a sip account when you have a sip and ring account

Change-Id: Ic2bed9ccb40bfb04c62c2afc0de553217da28b20

ring-android/libringclient/src/main/java/cx/ring/services/ContactService.java

@@ -134,7 +134,7 @@ public abstract class ContactService {
         CallContact contact = account.getContactFromCache(uri);
         // TODO load system contact info into SIP contact
         if (account.isSip()) {
-            loadContactData(contact).subscribe();
+            loadContactData(contact).subscribe(() -> {}, e -> Log.e(TAG, "Can't load contact data"));
         }
         return contact;
     }

ring-android/libringclient/src/main/java/cx/ring/smartlist/SmartListPresenter.java

@@ -154,7 +154,7 @@ public class SmartListPresenter extends RootPresenter<SmartListView> {
                 mCallContact = mContactService.findContact(currentAccount, uri);
                 mCompositeDisposable.add(mContactService.loadContactData(mCallContact)
                         .observeOn(mUiScheduler)
-                        .subscribe(() -> view.displayContact(mCallContact)));
+                        .subscribe(() -> view.displayContact(mCallContact), rt -> view.displayContact(mCallContact)));
             } else {
                 if (uri.isRingId()) {
                     mCallContact = currentAccount.getContactFromCache(uri);