fix: back press handling in settings activity

Signed-off-by: alperozturk <[email protected]>

Author: alperozturk96

app/src/main/java/com/owncloud/android/ui/activity/DrawerActivity.java

@@ -559,6 +559,7 @@ public void onMessageEvent(DummyDrawerEvent event) {
     private void onNavigationItemClicked(final MenuItem menuItem) {
         int itemId = menuItem.getItemId();
 
+        // Settings screen cannot display drawer menu thus no need to highlight
         if (itemId != R.id.nav_settings) {
             menuItemId = itemId;
         }