Remove usage of deprecated getTabLayout()

Bug: 12818957
Test: Manually
Change-Id: I60fea95f6b482609234f96d7fabf0702fc8d15dc
diff --git a/src/com/android/car/radio/RadioActivity.java b/src/com/android/car/radio/RadioActivity.java
index 73582b5..0be00a8 100644
--- a/src/com/android/car/radio/RadioActivity.java
+++ b/src/com/android/car/radio/RadioActivity.java
@@ -101,7 +101,7 @@
         mToolbar.setTitle(R.string.app_name);
         mToolbar.setLogo(R.drawable.logo_fm_radio);
         mToolbar.registerOnTabSelectedListener(t ->
-                viewPager.setCurrentItem(mToolbar.getTabLayout().getTabPosition(t)));
+                viewPager.setCurrentItem(mToolbar.getTabPosition(t)));
 
         updateMenuItems();
         setupTabsWithViewPager(viewPager);