Fix back arrow appearing as hamburger icon. NC PR: nextcloud#11769

Author: surinder-tsys

app/src/main/java/com/owncloud/android/ui/fragment/OCFileListFragment.java

@@ -1529,13 +1529,23 @@ protected void setTitle() {
                     setTitle(R.string.drawer_item_shared);
                     break;
                 default:
-                    setTitle(themeUtils.getDefaultDisplayNameForRootFolder(getContext()), false);
+                    setTitle(themeUtils.getDefaultDisplayNameForRootFolder(getContext()), isRoot());
                     break;
             }
         }
 
     }
 
+    //NMC Customization
+    //for NMC we are using defaultToolbar instead searchToolbar for which we needed customization
+    private boolean isRoot() {
+        Activity activity;
+        if ((activity = getActivity()) != null && activity instanceof FileDisplayActivity) {
+            return ((FileDisplayActivity) activity).isRoot(((FileDisplayActivity) activity).getFile());
+        }
+        return false;
+    }
+
     protected void prepareActionBarItems(SearchEvent event) {
         if (event != null) {
             switch (event.getSearchType()) {
@@ -1596,7 +1606,7 @@ public void onMessageEvent(ChangeMenuEvent changeMenuEvent) {
                 ((FileDisplayActivity) activity).initSyncBroadcastReceiver();
             }
 
-            setTitle(themeUtils.getDefaultDisplayNameForRootFolder(getContext()), false);
+            setTitle(themeUtils.getDefaultDisplayNameForRootFolder(getContext()), isRoot());
             activity.getIntent().removeExtra(OCFileListFragment.SEARCH_EVENT);
         }