InputTracer: Consolidate logic for marking event processing complete

Bug: 210460522
Test: atest inputflinger_tests
Change-Id: I2288565088dfd477e063c78be450699b258321a3
diff --git a/services/inputflinger/dispatcher/trace/InputTracer.h b/services/inputflinger/dispatcher/trace/InputTracer.h
index ccff30e..25a5651 100644
--- a/services/inputflinger/dispatcher/trace/InputTracer.h
+++ b/services/inputflinger/dispatcher/trace/InputTracer.h
@@ -56,6 +56,8 @@
         explicit inline EventState(InputTracer& tracer) : tracer(tracer){};
         ~EventState();
 
+        void onEventProcessingComplete();
+
         InputTracer& tracer;
         std::vector<const TracedEvent> events;
         bool isEventProcessingComplete{false};