Write to Wake Lock FMQ

Write the number of WAKE_UP sensor events handled by the Sensor
Service to the Wake Lock FMQ. This allows the Sensors HAL to release
its wake lock for events once the Sensor Service holds a wake lock for
the events.

Bug: 111070257
Test: Compile, configured system to use sensors@2.0 and ensured that
      a_sns_test received events
Test: Ensured device with sensors@1.0 receives events as expected
Change-Id: Ide091012bdaeb2e6a9fc4f5a43ddbb298dbf3416
diff --git a/services/sensorservice/SensorDevice.h b/services/sensorservice/SensorDevice.h
index d481ed2..282550f 100644
--- a/services/sensorservice/SensorDevice.h
+++ b/services/sensorservice/SensorDevice.h
@@ -82,6 +82,7 @@
     int getHalDeviceVersion() const;
 
     ssize_t poll(sensors_event_t* buffer, size_t count);
+    void writeWakeLockHandled(uint32_t count);
 
     status_t activate(void* ident, int handle, int enabled);
     status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,