allow subclasses to override onBind/onUnbind methods in VmsPublisherClientService

Test: NA / Manual on Car
Bug:72124448
Change-Id: I55ac2095cb2bdf50e34b876ea008aefde21dcb72
diff --git a/car-lib/api/system-current.txt b/car-lib/api/system-current.txt
index fe1a58b..c2b9244 100644
--- a/car-lib/api/system-current.txt
+++ b/car-lib/api/system-current.txt
@@ -932,8 +932,7 @@
     ctor public VmsPublisherClientService();
     method public final int getPublisherId(byte[]);
     method public final android.car.vms.VmsSubscriptionState getSubscriptions();
-    method public final android.os.IBinder onBind(android.content.Intent);
-    method public final boolean onUnbind(android.content.Intent);
+    method public android.os.IBinder onBind(android.content.Intent);
     method protected abstract void onVmsPublisherServiceReady();
     method public abstract void onVmsSubscriptionChange(android.car.vms.VmsSubscriptionState);
     method public final void publish(android.car.vms.VmsLayer, int, byte[]);