Add TopBar buttons in reverse order to match iOS ordering

lib/android/app/src/main/java/com/reactnativenavigation/viewcontrollers/TopBarButtonController.java

         });
     }
 
-    public void addToMenu(Toolbar toolbar) {
-        MenuItem menuItem = toolbar.getMenu().add(button.title.get(""));
+    public void addToMenu(Toolbar toolbar, int position) {
+        MenuItem menuItem = toolbar.getMenu().add(0, position, position, button.title.get(""));
         menuItem.setShowAsAction(button.showAsAction);
         menuItem.setEnabled(button.enabled.isTrueOrUndefined());
         menuItem.setOnMenuItemClickListener(this);

lib/android/app/src/main/java/com/reactnativenavigation/views/TitleBar.java

     public void setRightButtons(List<Button> rightButtons) {
         if (rightButtons == null) return;
         clearRightButtons();
-        for (Button button : rightButtons) {
-            TopBarButtonController controller = createButtonController(button);
+        for (int i = 0; i < rightButtons.size(); i++) {
+            TopBarButtonController controller = createButtonController(rightButtons.get(i));
             rightButtonControllers.add(controller);
-            controller.addToMenu(this);
+            controller.addToMenu(this, rightButtons.size() - i - 1);
         }
     }
 

lib/android/app/src/test/java/com/reactnativenavigation/viewcontrollers/TitleBarTest.java

         verify(buttonControllers.get(leftButton.id), times(1)).destroy();
     }
 
+    @Test
+    public void setRightButtons_buttonsAreAddedInReverseOrderToMatchOrderOnIOs() throws Exception {
+        uut.setButtons(new ArrayList<>(), rightButtons(textButton, customButton));
+        assertThat(uut.getMenu().getItem(1).getTitle()).isEqualTo(textButton.title.get());
+    }
+
     private List<Button> leftButton(Button leftButton) {
         return Collections.singletonList(leftButton);
     }