Load higher resoliton avatars in conversation list

Instead of a 64px avatar now the 512px version is loaded for
conversation lists. For avatars in a single conversation that was
already the case.

Resolves: #2302

Signed-off-by: Tim Krüger <t@timkrueger.me>

app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java

@@ -287,7 +287,7 @@ public class ConversationsListController extends BaseController implements Flexi
                 ApiUtils.getUrlForAvatar(
                     currentUser.getBaseUrl(),
                     currentUser.getUserId(),
-                    false),
+                    true),
                 currentUser);
 
             ImagePipeline imagePipeline = Fresco.getImagePipeline();