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/TaskbarManager.java

@@ -107,6 +107,11 @@ public class TaskbarManager implements DisplayController.DisplayInfoChangeListen
                 if ((configDiff & configsRequiringRecreate) != 0) {
                     // Color has changed, recreate taskbar to reload background color & icons.
                     recreateTaskbar();
+                } else {
+                    // Config change might be handled without re-creating the taskbar
+                    if (mTaskbarActivityContext != null) {
+                        mTaskbarActivityContext.onConfigurationChanged(configDiff);
+                    }
                 }
                 mOldConfig = newConfig;
             }