Update toolbar state custom styleable attribute name

Bug: 152254562
Test: Manual

Change-Id: I3b1c193f4c9bfe4c0255adc0e0abfa6d5375f13a
diff --git a/res/layout/radio_activity.xml b/res/layout/radio_activity.xml
index 45c022b..37101a1 100644
--- a/res/layout/radio_activity.xml
+++ b/res/layout/radio_activity.xml
@@ -33,7 +33,7 @@
         app:title="@string/app_name"
         app:layout_constraintTop_toTopOf="parent"
         app:logo="@drawable/logo_fm_radio"
-        app:state="home"/>
+        app:car_ui_state="home"/>
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/viewpager"