Setup Toolbar after it's measured

Since Toolbar icons' height is set according to Toolbar height,
We need to ensure the call to `setupToolbar` from `onCreate` is
called after the Toolbar is measured.

android/app/src/main/java/com/reactnativenavigation/activities/BottomTabActivity.java

         mBottomNavigation = (AHBottomNavigation) findViewById(R.id.bottom_tab_bar);
         mContentFrame = (FrameLayout) findViewById(R.id.contentFrame);
 
-        ArrayList<Screen> screens = (ArrayList<Screen>) getIntent().getSerializableExtra(EXTRA_SCREENS);
+        final ArrayList<Screen> screens = (ArrayList<Screen>) getIntent().getSerializableExtra(EXTRA_SCREENS);
         mBottomNavigation.setForceTint(true);
-        setupToolbar(screens);
         setupTabs(getIntent().getExtras());
         setupPages(screens);
+
+        // Setup Toolbar after it's measured since icon height is dependent on Toolbar height
+        mContentFrame.post(new Runnable() {
+            @Override
+            public void run() {
+                setupToolbar(screens);
+            }
+        });
     }
 
     private void setupPages(ArrayList<Screen> screens) {

android/app/src/main/java/com/reactnativenavigation/activities/SingleScreenActivity.java

 
         Screen screen = (Screen) getIntent().getSerializableExtra(EXTRA_SCREEN);
         mNavigatorId = screen.navigatorId;
-        setupToolbar(screen);
 
         mScreenStack = new ScreenStack(this);
         FrameLayout contentFrame = (FrameLayout) findViewById(R.id.contentFrame);
         assert contentFrame != null;
         contentFrame.addView(mScreenStack);
         mScreenStack.push(screen);
+
+        // Setup Toolbar after it's measured since icon height is dependent on Toolbar height
+        contentFrame.post(new Runnable() {
+            @Override
+            public void run() {
+                setupToolbar(getCurrentScreen());
+            }
+        });
     }
 
     protected void setupToolbar(Screen screen) {