Handle configuration changes in floating rotation button

Update resources in floating rotation button
when configurations such as screen density, screen size,
current locale have changed.

Bug: 200103245
Test: change display size, locale, fold/unfold
 -> check that floating rotation button resources
    are updated
Change-Id: Ia69f4f8b393a686012e286a1e39822650c562d52

quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java

@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.taskbar;
 
+import android.content.pm.ActivityInfo.Config;
+
 import androidx.annotation.NonNull;
 
 import com.android.systemui.shared.rotation.RotationButtonController;
@@ -94,6 +96,10 @@ public class TaskbarControllers {
         taskbarEduController.init(this);
     }
 
+    public void onConfigurationChanged(@Config int configChanges) {
+        navbarButtonsViewController.onConfigurationChanged(configChanges);
+    }
+
     /**
      * Cleans up all controllers.
      */