Add support to Tapl to recreateTaskbar

Also moved references of "tasbkar_view" to share TASKBAR_RES_ID constant

Test: compiles; see follow up CLs
Bug: 235986838
Change-Id: I69bcfa975550e567f3daa35af8a810546297d79c

quickstep/ext_tests/src/com/android/quickstep/DebugQuickstepTestInformationHandler.java

@@ -81,6 +81,11 @@ public abstract class DebugQuickstepTestInformationHandler extends QuickstepTest
                 return response;
             }
 
+            case TestProtocol.REQUEST_RECREATE_TASKBAR:
+                // Allow null-pointer to catch illegal states.
+                runOnTISBinder(tisBinder -> tisBinder.getTaskbarManager().recreateTaskbar());
+                return response;
+
             default:
                 response = super.call(method, arg, extras);
                 if (response != null) return response;