Handle recreate_taskbar in QuickstepTestInformationHandler

Currently only tests that use DebugQuickstepTestInformationHandle
are able to recreate the taskbar.

This change allows recreating the taskbar in system UI TAPL tests.

Bug: 273994695
Test: atest PlatformScenarioTests:android.platform.test.scenario.sysui.bubble.BubbleBarTest
Flag: NA
Change-Id: Id97d26c0aa77db23cd9031f47cf8dd3f79e6a158

quickstep/src/com/android/quickstep/QuickstepTestInformationHandler.java

@@ -149,6 +149,11 @@ public class QuickstepTestInformationHandler extends TestInformationHandler {
             case TestProtocol.REQUEST_REFRESH_OVERVIEW_TARGET:
                 runOnTISBinder(TouchInteractionService.TISBinder::refreshOverviewTarget);
                 return response;
+
+            case TestProtocol.REQUEST_RECREATE_TASKBAR:
+                // Allow null-pointer to catch illegal states.
+                runOnTISBinder(tisBinder -> tisBinder.getTaskbarManager().recreateTaskbar());
+                return response;
         }
 
         return super.call(method, arg, extras);